Size Guide

Find the size that best fits you or a loved one with the RUHAIN size guide. Use the charts below for rings, bracelets, and necklaces.
For the most precise fit, we recommend measuring an existing piece that fits well or consulting a local jeweler.

Ring Size Guide

Use the chart below to compare standard ring sizes across key international systems.
US Size UK Size EU / Circumference (mm) Inside Diameter (mm)
US 5 UK J 1/2 49.5 mm 15.7 mm
US 5.5 UK L 50.5 mm 16.1 mm
US 6 UK M 52.0 mm 16.5 mm
US 6.5 UK N 53.0 mm 16.9 mm
US 7 UK O 54.5 mm 17.3 mm
US 7.5 UK P 56.0 mm 17.7 mm
US 8 UK Q 57.0 mm 18.1 mm
US 8.5 UK R 58.5 mm 18.5 mm
US 9 UK S 59.5 mm 18.9 mm
US 9.5 UK T 61.0 mm 19.4 mm
US 10 UK T 1/2 62.5 mm 19.8 mm
US 10.5 UK U 1/2 63.5 mm 20.2 mm
US 11 UK V 1/2 65.0 mm 20.6 mm
US 11.5 UK W 3/4 66.0 mm 21.0 mm
US 12 UK Y 67.5 mm 21.4 mm
US 12.5 UK Z 69.0 mm 21.8 mm
US 13 UK Z+1 70.0 mm 22.2 mm
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Bracelet Size Guide

Measure your wrist and compare it with the chart below for a comfortable fit.
Size Wrist Size (in) Wrist Size (cm)
Extra Small 4.76–5.25 in 12.1–13.3 cm
Small 5.26–5.75 in 13.4–14.6 cm
Medium 5.76–6.25 in 14.6–15.9 cm
Large 6.26–6.75 in 15.9–17.1 cm
Extra Large 6.76–7.25 in 17.2–18.4 cm
XXL 7.26–7.75 in 18.4–19.7 cm
XXXL 7.76–8.25 in 19.7–21.0 cm

Necklace Length Guide

Necklace length affects where the piece rests and how it layers with other jewelry.
Length (in) Length (cm) Typical Position
14 in 35–36 cm Choker / close to neck
16 in 40–41 cm Base of throat / collarbone
18 in 45–46 cm Collarbone / most common length
20 in 50–51 cm Just below collarbone
22 in 56 cm Upper chest
24 in 61 cm Mid chest
30 in 76 cm Lower chest
36 in 91.5 cm Statement / layering length

Measuring Tips

  • Measure an existing ring's inside diameter for the best comparison
  • Measure your wrist snugly, then add a little room for comfort
  • Use string or a soft tape to visualize necklace lengths before purchase