01: Download the

Gemporia App

Download our free app in your phone or tablet’s app store.

Place a ring from the finger you wish to measure onto the screen of your device, then starting from the smallest size, use the arrows or slider to adjust the circle so it lines up with the inside edge of your chosen ring.

The ring size will be clearly displayed on screen so you can make you Gemporia purchase with confidence.

02: Download & Print

Our Ring Sizer Form

Download the correct ring sizer (Letter for North America/a4 for the rest of the world) When printing, do not scale to fit the page.

Use a credit card or ruler to check the ring size is calibrated correctly. Place a ring from the finger you wish to measure onto the page.

When you have chosen a circle which lines up with the inside edge of your ring, you have found the correct size.

03: Request your

Free Ring Sizer

Click request a ring sizer below, fill out your details and we’ll send you a ring sizer.

Once your ring sizer arrives, loop the sizer around the finger you wish to measure and adjust until it fits comfortably. The arrow on the sizer will show you your perfect ring size.

Take a look below at our ring sizing tips, to make sure your measurement is as accurate as it can be.

Don’t forget! You can use

Our Ring Resizing Service

Have you found a ring that you love, but not in your size, getting your ring resized with Gemporia couldn’t be easier.

Once you’ve decided on the correct size, send your ring to us using a secure, insured method. When we receive your ring, one of our in-house jewellers will carefully resize your ring to your required size.

We’ll then return your piece to you securely and quickly so you can continue to enjoy your gemstones. Want to get your ring(s) resized? Click the button below to get started.


US / Canada UK/ Australia/ South Africa France Germany Italy/ Spain/ Netherlands/ Switzerland
5 J/K 49 15¾ 9
6 L/M 51½ 16½ 9
7 N/O 54 17¼ 14
8 P/Q 56½ 18 16½
9 R/S 59 19 19
10 T/U 61½ 19¾ 21½
11 V/W 64 20¾ 24
12 X/Y 67½ 21¼ 27½
13 Z+ 68¾ 22 28¾


1 . Measure at the end of the day when your fingers are largest.

2 . Go up a size for rings with a thick band.

3 . Make sure your ring isn't too tight or too loose.

4 . Do not measure your ring size when your hands are cold.

5 . Do not measure your ring size the day after Alcohol compsumption.


Free Ring Sizer

Thank you for your request!
Your free ring sizer is on its way.