Ring Size Guide
OTUM
Find your perfect fit — beautifully.
Wear What Was Made for You
OTUM Jewellery
How to Measure at Home
Three easy steps
Cut a strip of paper
Use a thin strip roughly 1 cm wide and 10 cm long. A receipt or sticky note works perfectly.
Wrap & mark
Wrap the strip snugly around the base of your finger. Mark where it overlaps with a pen. This is your circumference.
Measure the strip
Lay the strip flat against a ruler. Match the measurement (mm) to the chart below to find your size.
Best time to measure: End of day, when fingers are slightly warmer and at their largest. Avoid measuring when cold.
Ring Size Chart
OTUM Size · US Size · Circumference · Diameter
| OTUM Size | US Size | Circumference (mm) | Diameter (mm) |
|---|---|---|---|
| XXS | 5 | 49.3 | 15.7 |
| XS | 6 | 51.9 | 16.5 |
| S | 7 | 54.4 | 17.3 |
| M | 8 | 57.2 | 18.2 |
| L | 9 | 60.0 | 19.1 |
Most popular sizes: S (US 7) and M (US 8) are OTUM's best-fitting sizes and suit most customers. When between sizes, always size up for comfort.
Still Not Sure?
We're here to help
Message us directly
DM us on Instagram or email otum.jewellery@gmail.com and we'll guide you to your perfect size before you order.
Free size exchanges
Ordered the wrong size? We offer free exchanges on unworn rings within 14 days of delivery.
Made with intention. Worn with meaning.