Article Quick Facts
Standard Boba Cup Sizes and Volumes
In the international bubble tea market, consistency is key. Most global chains standardize their drink sizes into three categories: Small (12oz/360ml), Medium (16oz/500ml), and Large (22oz/700ml), with an optional Jumbo (32oz/960ml) for promotions. Choosing these standard sizes lets you use universal cup-sealing machines and standard-length straws, and keeps your lid inventory simple.
Bubble Tea Cup Size Chart (oz to ml)
The core boba cup size chart, with both US ounces and metric millilitres, plus the caliber and best use for each size.
| Size | oz | ml | Caliber | Best For |
|---|---|---|---|---|
| Small | 12 oz | 360 ml | 90 / 95 mm | Kids drinks, hot milk tea |
| Medium | 16 oz | 500 ml | 95 mm | Standard boba, fruit tea |
| Large | 22 oz | 700 ml | 95 mm | Iced teas, signature drinks |
| Jumbo | 32 oz | 960 ml | 107 mm | Promotional / XL sharing cups |
How Big Chains Name Their Sizes (Gong Cha, CoCo & More)
Different chains use different names for what are essentially the same volumes. Customers searching "gong cha cup sizes" or "coco milk tea large ml" are really asking about the same 500-700ml range. The table below maps the common naming so you can align your own menu to what buyers already expect.
Chain Size Naming vs Volume
A rough guide to how popular bubble tea chains label their cup sizes. Names vary by region; volumes are the industry-standard equivalents.
| Common Name | Typical Volume | Equivalent Size |
|---|---|---|
| Regular / Medium | 500 ml (16 oz) | Medium |
| Large | 700 ml (22 oz) | Large |
| Small / Kids | 360 ml (12 oz) | Small |
| Jumbo / Sharing | 960 ml (32 oz) | Jumbo |
The Rise of the 95mm U-Shape Cup
The "U-Shape" or "Fat Cup" has become the visual signature of premium bubble tea. Unlike traditional tapered cups, the U-shape has a rounded bottom that showcases boba pearls and brown sugar streaks beautifully. Most U-shape cups use a 95mm caliber, which is compatible with most automatic sealing machines and dome lids. See our verified 95mm U-shape specifications on the injection PP cups page.
Which Material for Which Size?
For iced, visual drinks (fruit teas, layered lattes) choose crystal-clear PET cold cups. For hot milk tea or a premium in-hand feel, choose injection PP cups, which handle heat up to ~100°C. Both are available in the 95mm caliber, so you can standardize one lid and one sealing film across your whole menu regardless of material. Browse the PET cold cups and injection PP cups pages for full spec tables, then request a quote with your chosen sizes.
Article FAQs
The 16oz (500ml) is the global standard for "Regular" or "Medium", and the 22oz (700ml) is the standard for "Large". Most shops build their core menu around these two.
The standard boba sizes are 360ml (12oz / Small), 500ml (16oz / Medium), 700ml (22oz / Large) and 960ml (32oz / Jumbo).
Major chains use the same industry-standard volumes — roughly 500ml for a regular and 700ml for a large — even though the size names differ by brand and region.
Yes. As long as the caliber is 95mm or 98mm, standard cup-sealing machines work perfectly with the rounded U-shape design.
Most boba shops standardize on the 95mm caliber, which covers 16oz and 22oz cups with a single lid and sealing film, minimizing inventory.