–HOW TO MEASURE YOUR RING SIZE —

SCROLL BELOW TO FIND THE ONLINE RING MEASURING TOOL

US Size UK Size Diameter (mm)
Professional Ring Sizing Tool

Professional Ring Sizing Tool

Step 1: Calibrate Your Screen

Select an object you have and match it to the on-screen rectangle:

Credit Card
85.6 × 53.98 mm
SD Card
32 × 24 mm
Ruler (10 cm)
100 × 20 mm

Hold a credit card against the screen and adjust until sizes match.

Step 2: Measure Your Ring

Place your ring over the circle and adjust until the sizes match:

Diameter: 0.0 mm
Circumference: 0.0 mm
US Size: 0
UK Size: 0

Ring Size Reference:

US Size
UK Size
Diameter (mm)

Measurement Tips:

  • Measure the inside diameter of your ring
  • For best accuracy, measure at room temperature
  • If between sizes, go up half a size
  • Fingers swell during the day – measure in the evening

Note: This tool provides estimates only. For perfect fit, visit a professional jeweler.

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