Supported Features
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Larger Text
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Dark Interface
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Sufficient Contrast
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Reduced Motion
LoopSize – Ring Sizer Chart
Ring Size Measurement Tool
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Measure, convert, and share ring sizes with precision. Ideal for shopping, gifting, and jewelry service.
Find the right ring size before you buy online, choose a gift, travel, or help a jewelry customer.
LoopSize is a precise ring size converter and measurement tool for shoppers, gift buyers, jewelers, and anyone who needs to compare ring sizes across countries. Measure a ring or finger by diameter or circumference, then instantly see matching sizes in the most common international standards.
Use LoopSize when you want to:
• Check a ring size before ordering from an online store.
• Convert ring sizes between countries while shopping abroad.
• Choose a gift ring with more confidence.
• Help jewelry customers compare local and international sizes.
• Record finger and ring measurements for future purchases.
• Share a clean PDF with a store, customer, partner, or family member.
• Keep diameter and circumference visible for more precise decisions.
How it works:
1. Measure the ring or finger using diameter or circumference.
2. LoopSize converts the measurement into equivalent ring sizes.
3. Save the result, review it later, or share it as a PDF.
Supported standards: BR, US, UK, EU/ISO, JP, CN, and IN.
LoopSize focuses on the measurement behind the size. Instead of guessing from a chart, you can work from the actual diameter or circumference and compare results across multiple standards in one place. This is useful for engagement rings, wedding bands, fashion rings, adjustments, resizing conversations, and repeat purchases.
For shoppers, LoopSize helps reduce confusion when product pages use different ring sizing systems. For gifts, it gives you a simple way to save and compare possible sizes. For jewelers, it creates a faster workflow for checking measurements, explaining conversions, and sending results to customers.
Pro features:
• Branded PDFs help jewelers send professional measurement summaries to customers.
• iCloud sync keeps measurements and preferences available across devices.
• Measurement history helps with repeat customers, future purchases, and follow-up fittings.
Privacy Policy:
https://adrianosouzacosta.com.br/apps/loopsize/privacy-policy
Terms of Use:
https://adrianosouzacosta.com.br/apps/loopsize/terms-of-use
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Performance improvements and bug fixes
The developer, Adriano Souza Costa, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Adriano Souza Costa
- Size
- 22.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 5 more
- English, French, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Weekly $0.99
- Lifetime $24.99
- Annual $24.99
- Monthly $0.99
- Copyright
- © 2026 LoopSize