Ring Size Guide

Ring Size Guide
Find Your Perfect Fit

Finding your perfect ring size is simple.
Whether you’re measuring at home or using a ring you already own, we’ve made it easy to get the right fit for your MONOOC jewelry.

If you’re between sizes, we recommend choosing the larger size for a more comfortable fit.

Method 1: Measure a Ring You Already Own

The easiest way to find your size.

Choose a ring that fits the finger you want to wear your new piece on
Measure the internal diameter of the ring (in mm)
Match your measurement with our size chart below

💡 Tip: Make sure you measure the inside edge, not the outer edge.

Method 2: Measure Your Finger at Home
Wrap a thin strip of paper or string around your finger
Mark where the ends meet
Measure the length in millimeters
Compare with our size chart below

💡 Tip: Measure at the end of the day when your fingers are at their largest for the most accurate fit.

Ring Size Tips
If you’re between two sizes → choose the larger size
Wider bands feel tighter → consider sizing up
Fingers may swell in heat and shrink in cold weather
Measure multiple times for accuracy
Ring Size Chart
Internal Diameter (mm) US Size UK Size EU Size
14.5 mm 3.5 G 45
15.2 mm 4.5 I 48
16.0 mm 5.5 K 50
16.5 mm 6 L 51
17.3 mm 7 N 54
18.2 mm 8 P 57
19.0 mm 9 R 59
19.8 mm 10 T 62
Not Sure About Your Size?

If you’re unsure, don’t worry—our customer care team is here to help you find the perfect fit before you place your order.