Measure Your Ring Size at Home in Minutes
Four reliable methods—string, tape, a ring you already own, or a free printable sizer—then match millimeters to US, UK, or EU.
4 ways to measure at home
How to measure ring size at home
1. Pick the right time
Measure at room temperature—usually afternoon or evening. Cold fingers run smaller; swollen or post-workout hands run larger.
2. Choose a method
String or soft tape for a new measurement; an existing ring’s inner diameter for the most accurate home result; or our printable ring size chart printed at 100% scale.
3. Measure circumference in mm
Wrap at the finger base where the ring will sit—snug, not tight. Mark the overlap, lay flat, and note length in millimeters (preferred over inches for charts).
Or measure an existing ring
Place a well-fitting ring on a ruler and read the inside diameter in mm. Match that number on the diameter (mm) column of the ring size chart.
4. Convert to US, UK, or EU
Open the ring size converter (By Measurement) or find your mm row on the chart. UK shoppers: read the letter column (e.g. L½, Q)—same mm, different label system.
5. Double-check
Measure two or three times on different days. Wide bands (over ~6 mm) often feel tighter—consider a half size up.