LoopSize makes it easy to measure and convert ring sizes in BR, US, UK, EU/ISO, JP, CN & IN. Save, share, and export precise measurements in PDF.
LoopSize - Ring Size Converter
FAQ
Which ring size standards does LoopSize support?
We support BR, US, UK, EU/ISO, JP, CN, and IN. You can switch between them at any time.
Can I save my measurements?
Yes! With the Pro plan, you can save measurements and export them as a custom PDF.
Do the printed sizes match the real size?
Yes. The PDF uses a true-to-scale mm→pt conversion for A4. We recommend checking with a credit card to confirm the scale on your first print.
Does it work offline?
Yes, all calculations are done locally. Sharing features may require an internet connection.
How do I restore my purchases?
If you’ve already purchased LoopSize Pro, you don’t need to pay again when switching to a new iPhone or reinstalling the app. Simply tap the “Restore Purchases” button in the paywall and the app will automatically check, through your Apple ID, all your previous purchases and subscriptions. If there’s an active subscription or lifetime purchase, Pro access will be unlocked instantly — at no extra cost.