No Printing · No App · 100% Digital

Find Your Exact Ring Size
in 60 Seconds

Two precision methods. Completely digital. Works on any phone, tablet, or computer — no PDF downloads, no ruler required.

Screen Sizer

Place a ring you own flat on your screen. We calibrate using a credit card, then match your ring's inner diameter.

Point your camera at your finger next to a credit card. AI detects your ring finger's PIP joint width instantly.

100% Private

Camera AI runs locally in browser

Instant Results

US, UK, EU & Indian sizes at once

Pro Accuracy

Calibrated to within 0.1 mm

Reference guide for US, UK, EU, and Indian sizing standards

Diameter (mm)	US / CA	UK / AU	EU / DE	India
14.65	3	F	46	4
15.04	3½	G	47	6
15.40	4	H	48	8
15.80	4½	I	50	10
16.10	5	J	51	12
16.51	5½	K	52	14
16.92	6	L	53	16
17.32	6½	M	55	18
17.73	7	N	56	20
18.14	7½	O	57	22
18.54	8	P	58	24
18.95	8½	Q	60	26
19.35	9	R	61	28
19.76	9½	S	62	30
20.17	10	T	63	32

Showing common sizes — our sizer covers sizes 2 through 13.

Simple. Fast. No guesswork.

Have a ring that fits? Use the Screen Sizer. Measuring a bare finger? Use the Camera Sizer.

Hold a standard credit card to your screen or camera to establish a real-world measurement baseline.

Receive your ring size instantly in US, UK, EU, and Indian standards simultaneously.