Which Lid Fits Which Cup? The Diameter Cheat Sheet

Here's the mistake that costs cafés a box of useless lids at least once: ordering a lid by the ounce size of the cup. A lid doesn't care how much the cup holds — it clips onto the rim, and rims are measured in millimeters. Learn to think in rim diameter and you'll never order a mismatched lid again.

The one rule: match the rim, not the ounces

Two cups that hold different amounts can share the exact same rim — and often do. A 12 oz, 16 oz, and 20 oz hot cup are usually all built on the same 90 mm rim, which is why a single lid fits all three. That's a feature: fewer lid SKUs to stock, one lid for most of your hot menu. But it only works if you order by the millimeter, not the ounce.

How to measure a rim in ten seconds

Take an empty cup and measure straight across the outside of the rolled top rim, edge to edge, in millimeters. That number — not the volume printed on the side — is what has to match your lid. If you're between sizes, measure two cups and average; rims are consistent within a size.

What our lids fit

We make lids in five rim diameters — 80, 90, 92, 95, and 98 mm — which cover the standard cup families. As a starting guide (always confirm the exact rim of your cup when you quote):

• Small hot cups (around 8 oz) → 80 mm lids — sip lids, paper lids, flat lids.
• Medium to large hot cups (around 12–20 oz) → 90 mm lids — the workhorse size, and usually one lid across all three volumes.
• Our clear PET cold cups → 98 mm flat and dome lids.
• Boba / U-shape cups → 90 mm film seal or snap lid; our double-hole boba lids also come in 95 mm.

Then match the lid to the job

Once the diameter's right, the style is about the drink:

• Iced drinks: a flat straw-slot lid.
• Cold foam & toppings: a high-dome lid — around 40 mm of clearance so nothing gets crushed.
• Hot to-go: a sip lid — swivel, lift-to-drink, split, or rotating.
• Delivery: a flip leak-proof lid with a gasket seal.
• Boba: a double-hole lid or a film seal.
• Plastic-free: a pressed paper lid.

The foolproof move

Order your cups and lids together, from the same supplier, in the same quote. When we spec both, we guarantee they mate — no measuring, no mismatched box, no scramble mid-rush. If you're keeping cups you already have, send us the rim measurement (or just a cup) and we'll match the lid to it. Either way, it comes with a free mock-up so you see the fit before you commit.