If you supply catering kitchens instead of home bakers, the baking tray question is not “full sheet or half sheet” — it is gastronorm. Catering ovens, combi ovens and rack systems across Europe and most export markets are built around the GN standard, and a tray that does not fit the GN grid is a tray the kitchen cannot use, whatever its price. A GN 1/1 tray measures 530 by 325 mm nominally; a GN 1/2 is half that footprint; a GN 2/3 splits the difference for ovens with three columns. Wholesale buyers supplying catering and foodservice customers should spec trays by GN size first, then by material, edge profile and height — and confirm the details against the actual oven and rack before committing a container to one format.
What Gastronorm Means for a Baking Tray Buyer
Gastronorm (GN) is the modular sizing system used across commercial kitchens, based on a standard footprint of 530 by 325 mm for the full GN 1/1 unit. Every other GN size is a fraction of that footprint: GN 1/2 is half of GN 1/1, GN 2/3 is two-thirds, GN 1/3 is a third, and so on. The system exists so that trays, containers, pans and racks from different suppliers work together — a GN 1/1 tray sits on a GN 1/1 rack, and a GN 1/2 container fits beside another GN 1/2 on the same rack level.
For a wholesale buyer, GN is not a technicality; it is the compatibility contract of the catering industry. A bakery that runs full-sheet pans may care about American sheet sizes, but a hotel kitchen, a catering company, a hospital or a school canteen buys equipment and trays on the GN grid. When you sell baking trays into those customers, the first specification is the GN size, and the second is whether the tray’s usable dimensions sit correctly inside the customer’s oven rails or combi-oven racks. Trays that are nominally GN but slightly oversized for the rack are a common import complaint — the tray looks right on paper and jams in the oven. Confirm the loaded dimensions, not just the nominal GN name.
GN Sizes at a Glance: What Each Format Is Used For
| GN size | Nominal footprint (mm) | Typical kitchen use |
|---|---|---|
| GN 1/1 | 530 × 325 | Full-size trays for sheet baking, roasting and oven loads on one level |
| GN 2/3 | 354 × 325 | Three-column ovens and counters; hotel and catering portions |
| GN 1/2 | 265 × 325 | Half-size loads, two per full rack level, small kitchens and combi ovens |
| GN 1/3 | 325 × 176 | Small portions, individual services and holding lines |
The GN footprint is the floor plan; the tray’s height and edge profile are the rest of the spec. Catering baking trays are usually shallow, with heights from around 20 mm up to 40 mm depending on use, and the edge style matters: a rolled or reinforced edge adds rigidity and is easier to clean, while a plain cut edge can be sharp and more prone to warping under heat. The tray can also be solid, perforated or grid style — perforated trays speed air circulation for baked goods, solid trays hold liquids and catch drips, and grid trays are used where maximum airflow matters. A wholesale range that carries only one style is selling to only one slice of the market.
Before you settle on the size mix, ask which ovens your customers actually run. Combi ovens with GN racks are the fastest-growing catering format, and most take GN 1/1 or two GN 1/2 trays per level. Older deck ovens may run on different rails entirely. The safe commercial move is to sell the GN sizes that match the installed base, and to publish the exact usable dimensions on your spec sheet so the kitchen can check its own racks before ordering.
Material Choice: Aluminum, Carbon Steel or Stainless
GN baking trays are made in three main materials, and each one behaves differently in a catering kitchen. Aluminum conducts heat well, is light to handle and is inexpensive; plain aluminum is the workhorse of volume baking, and anodized aluminum adds a harder, more corrosion-resistant surface at a higher cost. Carbon steel is stronger and holds its shape under heavy loads but is heavier, and bare carbon steel rusts if not seasoned and dried properly; coated carbon steel solves the rust problem at a price. Stainless steel is the most durable and easiest to clean, but it is heavier, more expensive and a weaker heat conductor — which is why stainless trays are usually chosen for durability and foodservice cleaning regimes rather than for even baking.
The material decision changes the sales story. For a bakery customer who bakes every day, aluminum’s heat response and light weight are the selling points. For a hotel kitchen that runs trays through a dishwasher repeatedly, stainless or anodized surfaces survive the cleaning regime better. For a value catering supplier, coated carbon steel can be the price-to-durability sweet spot. The carbon steel versus aluminum versus stainless comparison on this site works through the trade-offs for baking tray programs in detail; the GN angle adds the size and rack compatibility layer on top.
Food-contact documentation follows the material. Aluminum, carbon steel and stainless trays that touch food need material test reports and food-contact statements appropriate to the destination market, and coated trays need coating documentation too. A catering supplier sells to kitchens that are themselves inspected, so the paperwork chain — factory test report, batch record, buyer’s compliance file — is part of the product. Confirm with the supplier which documents are available for the specific tray type before you promise them to a customer.
Combi-Oven Compatibility: The Spec That Decides Repeat Orders
The fastest-growing market for GN trays is the combi oven, and combi-oven buyers are unforgiving about fit. A combi oven has rack levels at fixed spacing, usually measured in the oven’s own standard pitch; trays that are too thick, too tall or too wide for the rack level simply do not work. When you buy GN trays for combi-oven customers, confirm the maximum tray height the oven level accepts and the rack’s usable width and depth — and check it against the tray’s loaded dimensions, not its nominal GN size.
Practical details decide whether a tray earns reorders. A tray that slides easily on the oven rails without catching the front lip saves kitchen time every single day. A tray with a stable, non-rocking footprint loads and unloads safely. A tray whose edges do not distort after months of thermal cycling keeps fitting the rack. These are the properties that show up in the QC file and in the sample approval, and they matter more than a slightly lower price from a factory that has never measured a combi rack.
Perforated and grid trays add a compatibility note: the perforation pattern and open area change airflow and cooking time, so the kitchen treats them as different tools, not variants of the same tray. A catering supplier that can explain the difference — and can supply both solid and perforated in the same GN size — sells to the kitchen’s workflow instead of selling a single SKU.
Quick answer: GN 1/1 or GN 1/2 for a first catering range?
Start with GN 1/1 as the hero size — it is the most common full-size format and the one most ovens and racks are built around — then add GN 1/2 for the many kitchens that run two half-size trays per level. GN 2/3 belongs in the range when you serve three-column oven customers; GN 1/3 is a small-volume add-on, not a first-order line.
Height, Edge Profile and Reinforcement: Reading a Tray Spec
Two trays with the same GN footprint can be completely different products. The height of the rim decides what the tray can hold and how it fits the rack pitch. The edge profile decides rigidity, cleaning ease and how the tray behaves when it is loaded and hot. The corner and rim construction decides whether the tray warps after repeated use. A well-designed GN tray has a reinforced rim or a rolled edge that resists distortion, corners that do not catch on rack guides, and a base flat enough to sit level when loaded. The cheapest trays cut these details, and the savings show up as warped trays and jammed racks — the exact complaints that end catering supply relationships.
On the spec sheet, the buyer should see: GN size, usable width and depth, rim height, edge style, material and gauge, solid or perforated with open-area percentage where relevant, and the maximum recommended oven temperature. If a supplier cannot give you a spec sheet with those fields, that is information about the supplier as much as about the tray. The gauge, flatness and warp-resistance guide on this site explains the QC side of tray distortion; the GN program needs those checks at every batch, because catering customers reorder the same spec for years and notice any drift.
Ordering for Catering Supply: Case Counts, Rack Systems and Cross-Sell
Catering supply is a repeat-order business. A kitchen that standardizes on GN 1/1 aluminum trays will reorder the same tray, in the same quantity, on a rhythm — and it will also buy GN containers, lids, racks and accessories from the supplier who made the tray experience easy. That is the commercial logic of a catering-focused bakeware range: the tray is the entry product, and the range around it is where the margin lives. The commercial bakery rack systems guide on this site covers the rack side of that ecosystem; a catering program should plan the same way, mapping trays, containers and rack accessories as one compatibility family.
Case counts for catering trays are usually quoted in dozens or fixed factory packs, and the export carton count matters for two reasons: freight economics and the kitchen’s own storage. Catering trays stack flat, so carton cube is manageable, but the carton must protect the surfaces — aluminum trays scratch easily, and coated trays can be damaged by sliding against each other in transit. Confirm the pack count, the interleaving or protection between trays, and the carton weight, because a catering buyer who orders fifty trays expects them to arrive flat, clean and usable, not bent at the corners.
The RFQ for a GN tray program should also settle the tolerance conversation: dimension tolerance on the GN footprint, flatness check after production, coating or finish checks where relevant, and the sampling plan for the batch. Catering buyers work to their own supplier standards, and they will ask for batch records; set the factory up to produce them from the first order.
QC Points for GN Trays
| Check | What to verify | Why it matters for catering |
|---|---|---|
| Footprint tolerance | Usable width, depth and corner radii against spec | A tray that jams the rack fails in the kitchen on day one |
| Rim height and edge | Consistent height, rolled or reinforced edge | Rack pitch fit and cleaning behavior depend on the rim |
| Flatness and warp | Base flatness at rest, warp after heating sample | Warped trays rock on the rack and cook unevenly |
| Material and coating | Grade, coating adhesion, food-contact documents | Kitchens are inspected; the documentation chain must hold |
| Surface protection | Interleaving and carton condition on arrival | Scratched or dented trays become immediate claims |
The same tray ordered month after month must stay the same. Record the approved sample, keep the batch records, and check every production run against the sample — for GN trays, consistency is the whole business, because the customer’s rack does not change when the factory changes its process.
Building the Assortment: From Trays to a Catering Bakeware Program
A wholesale buyer entering catering supply does not need to become a full foodservice equipment dealer overnight. A focused start is a GN tray range in the sizes and materials your local catering market actually runs, plus the most-ordered accessories: GN containers and lids in matching sizes, and the rack or roll-in accessories the kitchens use with them. The bakeware products range gives a structure for building that assortment across tray, pan and mold categories; the GN line is the foodservice column of the same shelf.
Seasonality is gentler in catering supply than in holiday retail — kitchens bake every week — but it is not flat. Schools and canteens have term calendars, hotels have event seasons, and catering companies spike before large events. Ask your customers about their annual volume pattern before you commit minimums, and keep enough flexibility in the order schedule to add a repeat line quickly. A catering buyer who trusts your tray quality will hand you the reorder without a second sourcing round; that trust is built on the first container arriving flat, true to spec and documented.
Export Cartons, Container Load and the Paperwork That Travels with GN Trays
Gastronorm trays ship in packs that are easy to get wrong. Metal trays stack flat, so a carton can hold a surprising number of units, but the carton count, the interleaving between trays and the carton cube decide both your freight cost and the condition of the goods on arrival. A common factory default is to pack trays without interleaving and fill the carton to the weight limit; the result is trays that arrive with surface scratches, coated trays with rubbed spots and corners that have dented each other. For a catering buyer who inspects on arrival — and catering buyers do — the first container is the one that sets the relationship. Confirm the pack count, the interleaving or individual wrapping, the carton dimensions and the cartons-per-pallet figure in the PO, and check a packed carton at the factory before bulk loading.
The paperwork that travels with GN trays is shorter than for coated cookware but just as important. Aluminum and stainless trays need material test reports and food-contact statements appropriate to the destination market; coated carbon steel trays add coating documentation. Batch records that link the finished trays to the material lots make reorders and any market question easier to answer. If the order is palletized, confirm the pallet type and check whether the destination market requires treatment documentation for the wood — a pallet issue at customs is the kind of delay that a catering customer will not forgive, because the trays were needed for a service date, not a warehouse date.
What Drives the Price of a GN Tray (and Where Not to Save)
| Cost driver | How it moves the price | Where to look for value |
|---|---|---|
| Raw material | Aluminum, steel and stainless prices follow commodity markets | Confirm the material grade and gauge you are actually quoted for |
| Gauge and weight | Thicker material costs more and resists warping better | Match gauge to the job; a value tray for light baking does not need a commercial gauge |
| Edge and rim construction | Rolled or reinforced rims add labor and material | Reinforcement is where catering durability lives; do not strip it to save cents |
| Perforation or grid work | Extra process steps add cost per tray | Buy solid and perforated as separate lines; avoid one multi-process hybrid SKU |
| Coating and finish | Anodizing and non-stick or release coatings add cost and documentation | Specify coating only where the kitchen’s use demands it |
| Packaging | Interleaving, individual wrapping and carton quality add cost | Packaging is cheap insurance against arrival damage claims |
The cheapest GN tray on the market usually achieves its price by thinning the gauge, cutting the rim reinforcement and skipping the interleaving. For a home-baking customer that tray may be acceptable; for a catering kitchen that loads and unloads trays hundreds of times a month, the savings turn into warp, jams and scratches within weeks. Price the tray for the duty cycle, not for the catalog page.
Common Mistakes When Buying Gastronorm Trays Wholesale
- Buying on nominal GN size alone. The nominal footprint is not the loaded dimension; trays that are oversized for the rack fail in the kitchen. Confirm usable width, depth and rim height against the customer’s oven spec.
- One material for every customer. Aluminum, coated carbon steel and stainless serve different duty cycles and cleaning regimes. A single-material range closes the door on half the market.
- Skipping the interleaving conversation. Trays that arrive scratched or dented become immediate claims, and catering buyers notice surface condition on day one.
- Ignoring rack pitch. A tray with the right footprint but the wrong rim height or a thick edge may not fit the rack level of a combi oven. Check the height against the oven’s pitch.
- No batch documentation. Kitchens are inspected, and their suppliers are asked for material and food-contact documents. If you cannot produce the file, you cannot keep the account.
- Ordering for a season instead of a rhythm. Catering demand is steadier than holiday retail, but it still has calendars — schools, hotels and event caterers all have peaks. Plan reorders against the customer’s volume pattern, not a single big buy.
Getting these decisions right turns the GN tray line from a commodity SKU into the entry product of a catering supply relationship. The tray that fits the rack, survives the dishwasher and arrives documented is the tray the kitchen reorders — and the reorder is where catering supply programs are built.
Frequently Asked Questions
What are the exact dimensions of a GN 1/1 baking tray?
The nominal GN 1/1 footprint is 530 by 325 mm. Usable dimensions, rim height and edge profile vary by manufacturer, so confirm the loaded dimensions against the customer’s oven or rack — nominal GN size alone does not guarantee the tray fits a specific combi oven or rack system.
Which GN sizes should a wholesale catering range carry first?
GN 1/1 as the hero size, then GN 1/2, which many kitchens run two-per-level. Add GN 2/3 for three-column oven customers and GN 1/3 for small portions once the core lines have proven their sell-through.
Are gastronorm trays the same as hotel pans?
They use the same GN footprint system, but they are different products. Baking and roasting trays are shallow with low rims and are used directly on oven racks, while hotel pans (GN containers) are deeper, usually have ledge or reinforced rims for holding in counter wells, and often come with lids. A catering range usually needs both.
Aluminum, carbon steel or stainless GN trays — which should I stock?
Stock to your customers’ cooking. Aluminum is the volume workhorse: light, fast heating and inexpensive, with anodized versions for harder surfaces. Carbon steel is stronger under load but heavier and needs rust protection if bare. Stainless is the most durable and cleanest under dishwashing regimes but costs more and conducts heat less evenly. Most catering ranges lead with aluminum and add coated carbon steel or stainless for the customers who need them.
Why do gastronorm trays jam in some combi ovens?
Usually because the loaded dimensions exceed the rack’s usable width, depth or height, or because the rim profile catches on the rack guides. Check the tray’s actual dimensions and rim height against the oven’s rack specification, and verify on a sample before ordering bulk quantities.
If you are building a catering bakeware program — GN trays, containers and rack-compatible lines for foodservice customers — send us your target market and the oven and rack formats your customers run. We source bakeware programs for catering suppliers every week. Request a quote and we will reply with a practical sourcing plan.