Two quotes for a "16 oz soup cup" can describe containers that differ by 40 ml in usable volume and by several millimetres at the rim, which decides whether your existing lids fit. Paper food container sizes are labelled inconsistently: some suppliers quote brim-full capacity, some a practical fill, some use US ounces in Europe and millilitres in the US. The fix is to compare brim capacity in ml and outside rim diameter on every quote; the indicative tables below give both units for each container type, followed by a method for sizing from your portions. For construction, barrier and print options, see custom printed paper food containers.
How are paper food container sizes measured?
Container size is a nominal capacity, usually given in US fluid ounces or millilitres. It may be the brim-full volume (filled level to the top of the rim) or a fill volume below the rim. The working fill is typically 80-90 % of brim capacity, and less for hot soup that must be lidded and carried.
Three things to confirm on every quote:
- Brim or fill. A 16 oz brim-full cup holds about 473 ml to the top, but realistically 380-420 ml of soup.
- Which ounce. Container sizes in the trade almost always use the US fluid ounce (29.57 ml). The UK imperial fluid ounce is 28.41 ml, so a "16 oz" stated in imperial terms would be about 455 ml. Ask if a UK supplier's figures are unclear.
- Rim diameter. This decides lid fit and is often more important than the capacity figure when replacing an existing container.
oz to ml conversion for food containers
| US fl oz | ml (exact conversion) | Common rounding in catalogues |
|---|---|---|
| 1 oz | 29.6 ml | 30 ml |
| 2 oz | 59.1 ml | 60 ml |
| 3 oz | 88.7 ml | 90 ml |
| 4 oz | 118.3 ml | 120 ml |
| 6 oz | 177.4 ml | 180 ml |
| 8 oz | 236.6 ml | 240 ml |
| 10 oz | 295.7 ml | 300 ml |
| 12 oz | 354.9 ml | 350-360 ml |
| 16 oz (US pint) | 473.2 ml | 470-480 ml |
| 20 oz | 591.5 ml | 590-600 ml |
| 24 oz | 709.8 ml | 710 ml |
| 26 oz | 768.9 ml | 750-770 ml |
| 32 oz (US quart) | 946.4 ml | 950 ml |
| 34 oz | 1,005.5 ml | 1,000 ml |
| 44 oz | 1,301.2 ml | 1,300 ml |
European bowls are usually designed in round millilitre figures (500, 750, 1,000, 1,300 ml) and converted to ounces for US buyers, while soup and ice cream cups are often designed in ounces and converted to millilitres.
Indicative sizes by container type
The tables below show sizes commonly found across the market. They are indicative: exact capacities, heights and rim diameters depend on the supplier's forming tooling and are confirmed at quotation and sampling.
Portion and sauce cups
| Size | Approx. capacity | Indicative rim diameter | Typical use |
|---|---|---|---|
| 1 oz | 30 ml | approx. 50-62 mm | Ketchup, mayo, chilli sauce |
| 2 oz | 60 ml | approx. 60-70 mm | Dressing, dips, guacamole |
| 3-4 oz | 90-120 ml | approx. 70-80 mm | Salsa, toppings, side dressing |
Soup cups and hot food containers
| Size | Approx. capacity (brim) | Indicative rim diameter | Typical use |
|---|---|---|---|
| 8 oz | 240 ml | approx. 90 mm | Cup of soup, side portion |
| 12 oz | 355 ml | approx. 90-98 mm (tall) or 115 mm (squat) | Regular soup, porridge |
| 16 oz | 473 ml | approx. 98-115 mm | Large soup, stew, curry |
| 24 oz | 710 ml | approx. 115-142 mm | Noodle soup, large curry |
| 32 oz | 946 ml | approx. 115-142 mm | Family soup, deli, sharing |
Salad, poke and food bowls
| Size | Approx. capacity (brim) | Indicative rim diameter | Typical use |
|---|---|---|---|
| 500 ml | approx. 17 oz | approx. 150 mm | Side salad, small poke, açaí |
| 750 ml | approx. 25 oz | approx. 150-165 mm | Regular poke, salad, pasta |
| 1,000 ml | approx. 34 oz | approx. 150-184 mm | Large salad, grain bowl |
| 1,100-1,300 ml | approx. 37-44 oz | approx. 165-184 mm | Large salad, sharing bowl |
Ice cream cups and tubs
Scoop cups typically run from 3 oz (about 90 ml) to 8 oz (240 ml), and take-home tubs from 500 ml or a US pint (473 ml) up to 1 litre or a US quart (946 ml). Coatings, freezer performance and ice-cream-specific sizing are covered in paper ice cream cups and tubs.
Snack cups and food pots
Snack cups and food pots, used for fries, popcorn chicken, fruit and yogurt, are commonly 8-16 oz (240-475 ml), often in a taller cup shape that is easy to hold while walking. Drinks cups follow their own conventions; see paper cup sizes: oz to ml guide and lid fit.
How do you choose the right container size for a portion?
Start from the portion volume, not the weight, then add headspace: about 10-20 % of brim capacity for cold food with a lid, and more for hot soup. Leafy salads need far more volume per gram than rice or soup, so a 300 g salad and a 300 g curry rarely fit the same container.
| Menu item | Typical portion (indicative) | Suggested starting size |
|---|---|---|
| Side soup | 200-240 ml | 8 oz with care, or 12 oz for delivery |
| Regular soup | 300-350 ml | 12 oz for up to about 320 ml eat-in; 16 oz for larger portions or delivery headroom |
| Large soup or stew | 400-450 ml | 16 oz |
| Ramen or noodle soup | 600-750 ml incl. noodles | 24-32 oz squat bowl |
| Side salad | 80-150 g leaves | 500 ml bowl |
| Main salad | 250-350 g with toppings | 1,000-1,300 ml bowl |
| Poke or grain bowl | 350-450 g | 750-1,000 ml bowl |
| Dressing | 30-50 ml | 2 oz portion cup |
| Single scoop ice cream | 1 scoop | 3-4 oz cup |
A worked example: a soup bar serves 300 ml portions for delivery. A 12 oz cup holds about 355 ml to the brim, so 300 ml is roughly 85 % full. That works for eat-in, but for a 25-minute delivery many operators move to a 16 oz cup filled to about 63 %, which leaves room for the lid to seat and for movement. Hot fill and leak control are covered in paper soup containers.
Why rim diameter matters as much as capacity
Lids fit by rim diameter and rim curl profile. Containers of different depth on the same diameter can share one lid, which reduces lid stock and mistakes on the line. Many ranges are built as diameter families: for example, several salad bowl depths on one diameter, or 12 and 16 oz soup cups on another.
When planning a range:
- Group sizes on as few rim diameters as practical, varying height for capacity.
- Check that wider, shallower bowls still stack and fit your bags and delivery boxes.
- Ask for the outside rim diameter measured across the curl, as well as the base diameter and height.
- Test lids on formed containers from production; small rim variations decide whether a lid seals.
Lid materials and vents are covered in lids for paper food containers.
Planning a size range for a chain
Fewer sizes usually means simpler stock, larger runs per size and fewer packing errors. Many chains run three bowl sizes and two or three soup sizes, with one printed design applied across each family.
- Map every menu item to a container and look for sizes used by only one item.
- Share rim diameters to share lids.
- Use one design rebuilt on each size's dieline (not simply scaled, because each size has its own fan-shaped template), with any size-specific text kept away from the seam and rim.
- Confirm the largest container fits your standard bag footprint and delivery box.
Wider menu rationalisation, including folded boxes, is discussed in how to reduce takeaway packaging SKUs, and multi-site roll-out in restaurant chain packaging.
How to measure a sample container
If you are replacing an existing container, measure a sample before asking for quotes:
- Brim capacity: weigh the empty container, fill with water to the top of the rim, weigh again; 1 g of water is about 1 ml.
- Rim diameter: outside edge to outside edge across the rim curl, in two directions to check roundness.
- Base diameter and height: base measured across the bottom outer edge; height from base to top of rim.
- Lid: note the lid's inside diameter and whether it snaps over the curl or pushes inside it.
What to send with a sizing request
- Each container type and size, stating brim or fill capacity and US oz or ml.
- Portion sizes per menu item, and eat-in, takeaway or delivery use.
- Rim diameter of any existing lids that must fit.
- Bag or delivery box dimensions the containers must fit into.
- Expected annual volume per size.
Send these through the contact page, or return to custom printed paper food containers for barrier and print options.