Ring Sizer App: Size Measure

Find your perfect ring size in under a minute — without a trip to the jeweller.

Three accurate measurement methods, all from your phone:

• Place a ring on your screen — match its inner edge to find the size • Measure your finger directly on the screen • Use a string or paper strip, then measure with the in-app ruler

Get your size in every system: US, UK, Australia, EU/ISO, Japan, China, South Korea, India, and Russia — shown side by side so you (or your jeweller) can pick instantly.

Band width matters. Wider bands need a slightly larger fit, and Ring Sizer adjusts the recommendation automatically based on the band you're shopping for.

Save sizes for everyone you shop for. Build a quick reference of finger sizes for partners, family, and friends — perfect for surprise engagements, anniversaries, and birthday gifts.

Whether you're buying an engagement ring online, ordering a custom band, or just curious — Ring Sizer takes the guesswork out of jewellery shopping.

No login required. No data leaves your phone.