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Ring Sizing, Made Simple

Ring sizing doesn’t have to be complicated. All Seredra rings follow standard US sizing but if you're more familiar with other systems or have your ring size in millimeters or inches, we’ve got you covered.

Our ring size conversion chart below makes it easy to convert between international sizes and US ones. Whether you're measuring at home or already know your size from another country, just check the chart below to find the best fit.

If you’re not sure where to start, we’ve included some simple tips to help you measure your ring size accurately.

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

\n Inside Circumference \n	\n Inside Diameter \n	\n US & Canada \n	\n Europe \n	\n UK & Australia \n	\n Japan & Singapore \n
\n IN \n	\n MM \n	\n MM \n
\n 1.74 \n	\n 44.3 \n	\n 14.1 \n	\n 3 \n	\n 44 \n	\n F 1/2 \n	\n 4 \n
\n 1.77 \n	\n 44.9 \n	\n 14.3 \n	\n 3.25 \n	\n 45 \n	\n G \n	\n 5 \n
\n 1.79 \n	\n 45.6 \n	\n 14.5 \n	\n 3.5 \n		\n G 1/2 \n
\n 1.82 \n	\n 46.2 \n	\n 14.7 \n	\n 3.75 \n	\n 46 \n	\n H \n	\n 6 \n
\n 1.84 \n	\n 46.8 \n	\n 14.9 \n	\n 4 \n	\n 47 \n	\n H 1/2 \n	\n 7 \n
\n 1.87 \n	\n 47.4 \n	\n 15.1 \n	\n 4.25 \n		\n I \n
\n 1.89 \n	\n 48.1 \n	\n 15.3 \n	\n 4.5 \n	\n 48 \n	\n I 1/2 \n	\n 8 \n
\n 1.92 \n	\n 48.7 \n	\n 15.5 \n	\n 4.75 \n		\n J \n
\n 1.94 \n	\n 49.3 \n	\n 15.7 \n	\n 5 \n	\n 49 \n	\n J 1/2 \n	\n 9 \n
\n 1.97 \n	\n 50.0 \n	\n 15.9 \n	\n 5.25 \n	\n 50 \n	\n K \n
\n 1.99 \n	\n 50.6 \n	\n 16.1 \n	\n 5.5 \n		\n K 1/2 \n	\n 10 \n
\n 2.02 \n	\n 51.2 \n	\n 16.3 \n	\n 5.75 \n	\n 51 \n	\n L \n
\n 2.04 \n	\n 51.8 \n	\n 16.5 \n	\n 6 \n	\n 52 \n	\n L 1/2 \n	\n 11 \n
\n 2.07 \n	\n 52.5 \n	\n 16.7 \n	\n 6.25 \n		\n M \n	\n 12 \n
\n 2.09 \n	\n 53.1 \n	\n 16.9 \n	\n 6.5 \n	\n 53 \n	\n M 1/2 \n	\n 13 \n
\n 2.12 \n	\n 53.7 \n	\n 17.1 \n	\n 6.75 \n		\n N \n
\n 2.14 \n	\n 54.3 \n	\n 17.3 \n	\n 7 \n	\n 54 \n	\n N 1/2 \n	\n 14 \n
\n 2.16 \n	\n 55.0 \n	\n 17.5 \n	\n 7.25 \n	\n 55 \n	\n O \n
\n 2.19 \n	\n 55.6 \n	\n 17.7 \n	\n 7.5 \n		\n O 1/2 \n	\n 15 \n
\n 2.21 \n	\n 56.2 \n	\n 17.9 \n	\n 7.75 \n	\n 56 \n	\n P \n
\n 2.24 \n	\n 56.9 \n	\n 18.1 \n	\n 8 \n	\n 57 \n	\n P 1/2 \n	\n 16 \n
\n 2.26 \n	\n 57.5 \n	\n 18.3 \n	\n 8.25 \n		\n Q \n
\n 2.29 \n	\n 58.1 \n	\n 18.5 \n	\n 8.5 \n	\n 58 \n	\n Q 1/2 \n	\n 17 \n
\n 2.33 \n	\n 59.1 \n	\n 18.8 \n	\n 8.75 \n	\n 59 \n	\n R \n
\n 2.35 \n	\n 59.7 \n	\n 19 \n	\n 9 \n		\n R 1/2 \n	\n 18 \n
\n 2.37 \n	\n 60.3 \n	\n 19.2 \n	\n 9.25 \n	\n 60 \n	\n S \n
\n 2.40 \n	\n 60.9 \n	\n 19.4 \n	\n 9.5 \n	\n 61 \n	\n S 1/2 \n	\n 19 \n
\n 2.42 \n	\n 61.6 \n	\n 19.6 \n	\n 9.75 \n		\n T \n
\n 2.45 \n	\n 62.2 \n	\n 19.8 \n	\n 10 \n	\n 62 \n	\n T 1/2 \n	\n 20 \n
\n 2.47 \n	\n 62.8 \n	\n 20 \n	\n 10.25 \n		\n U \n	\n 21 \n
\n 2.50 \n	\n 63.5 \n	\n 20.2 \n	\n 10.5 \n	\n 63 \n	\n U 1/2 \n	\n 22 \n
\n 2.52 \n	\n 64.1 \n	\n 20.4 \n	\n 10.75 \n	\n 64 \n	\n V \n
\n 2.55 \n	\n 64.7 \n	\n 20.6 \n	\n 11 \n		\n V 1/2 \n	\n 23 \n
\n 2.57 \n	\n 65.3 \n	\n 20.8 \n	\n 11.25 \n	\n 65 \n	\n W \n
\n 2.60 \n	\n 66.0 \n	\n 21 \n	\n 11.5 \n	\n 66 \n	\n W 1/2 \n	\n 24 \n
\n 2.62 \n	\n 66.6 \n	\n 21.2 \n	\n 11.75 \n		\n X \n
\n 2.65 \n	\n 67.2 \n	\n 21.4 \n	\n 12 \n	\n 67 \n	\n X 1/2 \n	\n 25 \n
\n 2.67 \n	\n 67.9 \n	\n 21.6 \n	\n 12.25 \n		\n Y \n
\n 2.70 \n	\n 68.5 \n	\n 21.8 \n	\n 12.5 \n	\n 68 \n	\n Z \n	\n 26 \n
\n 2.72 \n	\n 69.1 \n	\n 22 \n	\n 12.75 \n	\n 69 \n	\n Z 1/2 \n
\n 2.75 \n	\n 69.7 \n	\n 22.2 \n	\n 13 \n	\n 70 \n		\n 27 \n
\n 2.77 \n	\n 70.4 \n	\n 22.4 \n	\n 13.25 \n		\n Z+1 \n
\n 2.80 \n	\n 71.0 \n	\n 22.6 \n	\n 13.5 \n		\n Z+2 \n

How to Measure Your Ring Size

Whether you’re starting from scratch or already have a ring that fits, finding your size should be simple, and we’re here to make sure it is.

Option 1: Measure Your Finger

We’ve put together an easy step-by-step guide to help you figure out how to measure your ring size at home. Once you’ve got your measurement, just pop it into our size converter to find the US size that matches. Quick and simple.

Option 2: Use a Ring You Already Own

Got a ring that fits just right? Perfect. You can now print our ring size template, place your ring over the circles, and match it up. That’ll give you your size, and if it’s in a different sizing system, our chart helps you convert it to US sizes in no time.

Our Ring Sizing Tips

A good fitting ring should slide on easily and come off with just a little resistance. It should feel snug enough, not too loose or too tight.
Fingers can swell in the heat and shrink in the cold. For best results, measure at the end of the day when your hands are warm.
Measure your finger more than once just to be sure.
Left and right hands aren’t always the same size—measure the exact finger you’ll wear the ring on.
Wide bands feel snugger; for wider bands, consider going up half a size.
If you have bigger knuckles, measure both at the knuckle and lower on your finger, then choose in-between.
Between sizes? Choose the larger one—slightly roomy is better than too tight.

Still Not Sure?

That’s totally fine. All Seredra rings have a smooth, comfort-fit interior, so they feel good from day one. If you’re between sizes or want a second opinion, reach out—happy to help you land the perfect fit.

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