A customer at a counter wants one slice, hot, in one hand, with the topping still on it. A whole-pizza box is the wrong answer to that order, and so is a sheet of paper folded around the crust. Pizza slice packaging has to hold a wedge of dough that is heavy at one end and floppy at the tip, release steam, absorb or block grease and still look good in a customer's hand. The three main formats are flat triangle trays, wedge trays and slice boxes; the right one depends on how far the slice travels, and each is sized from the pizza diameter. For the wider product range, see custom printed paper food trays; whole pizzas are covered under custom printed pizza boxes.
Which pizza slice packaging format should you choose?
For walk-away counter service, a printed wedge or triangle tray is the usual choice; for a slice that travels, a vented slice box is better; for events and stadiums, a tray plus a paper sleeve or a holder keeps costs and handling manageable. The format decides how fast staff serve, how long the crust stays crisp and how much brand surface is visible.
| Format | Construction | Best for | Limits |
|---|---|---|---|
| Flat triangle tray ("triangle") | Single die-cut sheet with turned-up edges on two or three sides; glued corners or locking tabs | Counter service, eating within minutes | No lid; heat loss; crust tip can droop over the open end |
| Wedge tray with raised back | Shallow tray with a taller back wall to support the crust edge | Thick or heavily topped slices, hand-held eating | Larger blank; needs a deeper die layout |
| Slice box (wedge clamshell) | Hinged lid, triangular footprint; tab or tuck closure; optional vents and window | Short travel, takeaway by the slice, stacking in a bag | Closed lid traps steam if not vented; more board per slice |
| Square or rectangular slice box | Small folding clamshell | Detroit, Sicilian, pizza al taglio (rectangular) slices | Wasted space if used for wedge slices |
| Paper sleeve over a tray | Greaseproof or coated sleeve wraps a tray | Events, stadiums, queues needing speed | Sleeve and tray are two items; sleeve adds print area |
A flat triangle tray is the cheapest per slice and the fastest to serve. A slice box costs more and takes more storage but protects the slice for a short walk. Whole boxes with dividers are a third option for sharing orders, and that format is covered in the pizza box sizes guide and the pizza box size calculator.
How big should slice trays and boxes be?
Size the tray from the pizza radius and the number of slices. For a pizza cut into eight, the slice is as long as the radius and roughly three-quarters of the radius wide at the crust; add 1-2 cm of margin on each dimension. For a 30 cm pizza, that means a tray of about 16.5 cm by 13.5 cm.
The geometry is simple: slice length equals the pizza radius, and crust width equals 2 x radius x sin(180 / number of slices). The table applies it to common diameters cut into eight slices.
| Pizza diameter | Radius (slice length) | Crust width, 8 slices | Suggested tray (length x width) with margin |
|---|---|---|---|
| 25 cm (10 in) | 12.5 cm | about 9.6 cm | 14 x 11.5 cm |
| 30 cm (12 in) | 15 cm | about 11.5 cm | 16.5 x 13.5 cm |
| 33 cm (13 in) | 16.5 cm | about 12.6 cm | 18 x 14.5 cm |
| 35 cm (14 in) | 17.5 cm | about 13.4 cm | 19 x 15.5 cm |
| 40 cm (16 in) | 20 cm | about 15.3 cm | 21.5 x 17 cm |
| 45.7 cm (18 in) | 22.9 cm | about 17.5 cm | 24.5 x 19.5 cm |
Other cuts change the width. Six slices give a crust width roughly equal to the radius; ten or twelve slices make a narrower wedge, about 0.62 and 0.52 of the radius. Also allow for topping overhang, a loaded crust or a stuffed edge, and for the fact that real slices are rarely perfect: staff cut by eye, so a tray with 1-2 cm of margin is more forgiving than one cut to the exact wedge. Rectangular slices from pizza al taglio or Detroit-style pans are often in the region of 10 x 10 cm to 12 x 20 cm, set by the baking tray, so measure the real piece. Depth is typically 1.5-3 cm for trays and 3-5 cm for boxes holding a thick slice.
How do you keep a slice crisp and the pack grease-proof?
A slice goes soft when steam from the hot crust condenses on the nearest cool surface, and goes greasy when oil spreads into unprotected board. The remedy is to let steam out, keep the slice from sitting in its own oil and use a board or barrier that resists grease for the actual holding time.
- Open or vented design. A tray lets steam leave from the top, so the crust stays crisper. A slice box needs vents (holes or cut-outs) or a lid that does not seal tightly; a fully closed slice box in a warm bag can steam the crust within minutes.
- Raise the slice. A shallow ridge, a corrugated flute surface or a perforated insert lifts the base off the board, so oil and condensation run away from the crust. A sheet of greaseproof paper is a common low-cost alternative and is covered under custom printed greaseproof paper.
- Match board and barrier to the food. Cheese-heavy or oil-rich slices need more grease resistance than thin Margherita slices. Options range from fluorine-free grease-resistant board to PE or dispersion coatings, compared in coatings for paper food trays. The standard grease-resistance test is described in the KIT test guide.
- Control holding time. A tray that works for a slice eaten in three minutes may not work for one held under a heat lamp for fifteen. Specify the real holding time when asking for a quotation.
- Keep PFAS out. Grease-proofing agents of the PFAS family are restricted in the EU from 12 August 2026 and in a growing number of US states; see PFAS-free food packaging.
What about heat?
Hot slices from an oven or hot cabinet are typically in the region of 60-80 degrees Celsius at serving. Paper and PE-coated board tolerate that without difficulty; the issue is steam and grease, not temperature. Reheating a slice in its tray in a microwave is possible for short cycles with PE-coated or uncoated board, but should be confirmed against the actual board and coating, and is not suited to oven use.
Which slice pack suits which service model?
Match the pack to what happens to the slice after it leaves the counter.
| Service model | Typical handling | Suggested pack | Reason |
|---|---|---|---|
| Walk-up counter, eaten within minutes | Handed over, eaten on the spot | Flat triangle tray or wedge tray | Fast, low cost, steam escapes |
| Stadium, festival, queue | Hundreds of slices per hour | Triangle tray with sleeve or holder | Speed and branding visible to the next customer |
| Takeaway by the slice | 5-15 minutes in a bag | Vented slice box | Protects the slice and stacks |
| Delivery of slices | 15-30 minutes | Slice box in a bag, or a larger box with dividers | Heat retention, topping protection |
| Bakery, convenience, vending | Held on display | Slice box with window | Display visibility and hygiene |
For delivery, ask whether a whole-pizza box with a small divider would be cheaper than individual slice boxes; the pizza box venting guide explains how venting works in larger boxes, and the pizzeria packaging page covers the full set of items for a pizza operation.
What should be printed on slice trays and boxes?
Print the brand where the customer sees it while holding the slice: on the outer face of a box lid, on the sleeve, and on the visible part of a tray that stays outside the slice. The inside of a tray is covered by the slice and by grease, so large solid colour areas there are rarely worth it.
- Print on the flat sheet by offset litho on white board for fine detail, or by flexo or digital on kraft. See packaging printing methods.
- Keep logos away from the area under the slice and from crease lines.
- Test the finish: a matt or soft-touch varnish can look good but may mark under oil; varnish choice should be validated with the food.
- If the printed side contacts food, say so in the request; inks and varnishes must be suitable for that use. Pizza-specific print points are in the pizza box printing guide.
Are coated pizza slice trays single-use plastic?
A pizza slice tray with a plastic (PE or similar) coating is a single-use plastic food container under the EU Single-Use Plastics Directive (EU) 2019/904, while an uncoated or fluorine-free grease-resistant tray is not. A flat triangle tray is the borderline case: the Commission guidelines describe a plate as a lidless, predominantly flat dish with a slightly raised edge, and plastic-coated paper plates are banned, so a coated slice tray should have real walls or be uncoated.
In England, the single-use plastics ban from 1 October 2023 covers plastic-coated paper plates, trays and bowls supplied empty to the public, but trays filled at the point of sale, such as at a takeaway or bakery counter, are treated as packaging and are exempt. Scotland and Wales do not list trays. Obligations depend on the company's role and should be confirmed with the competent authority or compliance scheme. The detailed comparison of materials and rules is in paper vs plastic vs aluminium food trays, and food-contact documents are covered in food-contact packaging compliance.
What to send for a pizza slice packaging quotation
- Pizza diameter and number of slices per pizza, plus any rectangular slice dimensions.
- Format wanted: triangle tray, wedge tray, slice box (with or without window) or sleeve.
- Topping and grease level, and holding time to eating.
- Board colour (white, kraft) and barrier preference.
- Vent or window requirements for boxes.
- Artwork status, colours, and whether the inside is printed.
- Destination markets, for documents.
- Quantity per size and number of designs; MOQ depends on material, size, print method and run configuration (see the MOQ guide).
Send the specification through our contact page. More tray formats, coatings and print are on the paper food tray hub, and general tray sizes in paper food tray sizes.