Belt Size Calculator & Chart
Waist to EU, US, UK & JP Fit
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Type your waist once and get the matching EU, US, UK and JP belt size instantly, plus a fit preview that shows which hole you will land on.
Buckle turns one waist measurement into the belt size you actually need to order — in EU, US, UK and Japanese sizing, side by side, with a picture of which hole you will end up on.
Most belt mistakes happen at the last step: you know your waist, but the shop lists sizes in centimeters, letters or UK inches, and every brand chart looks different. Buckle removes the guesswork. Type your waist in cm or inches, and the nearest belt size for every region appears instantly, together with a hole-fit strip that shows whether that belt will sit snug, loose or right in the middle.
WHAT YOU GET
• Order the right belt on the first try, whether the shop lists EU, US, UK or JP sizes
• See at a glance whether a belt will sit snug, loose or in the sweet spot before you buy
• Switch between cm and inches with one tap — no mental math, no conversion tables
• Keep a saved size for every person you buy for, so gifts and reorders fit
• Browse the full size reference from 70 cm to 130 cm whenever you need a second look
• Get an answer in seconds, offline, with nothing to sign up for
PERFECT FOR
• Shoppers ordering belts online from brands in another country
• Anyone buying a belt as a gift and unsure which size to pick
• Families who want one place that remembers everybody's size
• Travelers browsing shops where the size labels look unfamiliar
WHY NOT JUST SEARCH FOR A CHART?
Web charts disagree with each other, rarely cover all four regions, and never tell you how the holes line up. Buckle uses one consistent reference, converts your exact measurement rather than a rounded guess, and keeps the result saved for the next time you shop. General unit converters can turn centimeters into inches, but they cannot tell you that 90 cm means a medium in the US and a 36 in the UK.
PRIVATE BY DEFAULT
Your measurements and profiles are stored only on your device. There is no account, no cloud sync, no ads and no tracking. Buckle works fully offline.
FULL ACCESS
Buckle requires a subscription or one-time purchase to unlock the complete experience: unlimited saved profiles, full EU, US, UK and JP conversions, and the detailed hole-fit chart. Choose a weekly plan, a yearly plan or a lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and payment is charged to your Apple ID account at confirmation of purchase. You can manage or cancel your subscription in your App Store account settings at any time.
Measure your waist, open Buckle, and order your next belt with confidence.
Terms of Service: https://pnkl26.web.app/terms-of-service
Privacy Policy: https://pnkl26.web.app/privacy-policy
Support: pnkhanhlinh0206@gmail.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.0
• Convert waist measurements between cm and inches instantly
• Regional size lookup: EU (70–130 cm), US (XS–XXXL), UK numeric, Japan numeric
• Full 13-step size chart from 70 cm to 130 cm in 5 cm increments
• Smart nearest-size matching for any measurement you enter
• Saved profiles — store name, waist, and preferred belt size for multiple people
• Fully offline — no account, no ads, no tracking required
Subscriptions
In-App Purchases
The developer, Linh Phan Nhat Khanh, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Linh Phan Nhat Khanh
- Size
- 3.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime Unlock $29.99
- Buckle Belt Sizer Weekly $2.99
- Buckle Belt Sizer Yearly $14.99
- Copyright
- © 2026 PNKL