What is the most accurate way to measure ring size at home?

Printing our calibrated strip is the most accurate home method. Before printing, confirm the 100 mm ruler bar on the sheet measures exactly 100 mm with a real ruler — if it does, the circles and strip are true-to-size. Measure in the evening when your fingers are warmest and largest.

What time of day should I measure my ring size?

Measure at the end of the day, when your fingers are at their largest. Fingers can vary by up to half a size between morning and evening, and can also swell in hot weather or after exercise. Avoid measuring when your hands are cold or after swimming.

Printable Ring Sizer (Accurate, Free PDF) + Online Ring Size Tool

Q: How do I know my ring size without going to a store?

Use our free printable ring sizer: print the sheet at 100% scale, cut out the strip, wrap it snugly around your finger, and read the size where the arrow meets the scale. Alternatively, use the On-Screen Sizer tab — calibrate your monitor with a credit card, then match the circle to a ring you already own.

Q: How do I measure my ring size at home without a ring?

Print our ring sizer strip, cut it out, and wrap it around the base of your finger. Make sure the fit is snug but you can still slide it over your knuckle. Measure at the end of the day when fingers are at their largest, and in a warm room. If you are between sizes, choose the larger one.

Q: How do I convert a UK ring size to US?

Use the Size Converter tab on this page. Select 'UK Letter', enter your size (e.g. N½), and you will instantly see the US, EU, diameter, and circumference equivalents. As a quick reference: UK N½ ≈ US 7, UK L½ ≈ US 6, UK P½ ≈ US 8.

Find your ring size at home — free, accurate, no signup required. Print our calibrated strip & circle chart, match a ring on your screen, or convert between US, UK, and EU sizes instantly. Everything runs in your browser; nothing is stored.

US	UK	EU	⌀ mm	Circ. mm
3	F	44	14.05	44.13
3.25	F½	45	14.27	44.83
3.5	G	45	14.48	45.49
3.75	G½	46	14.65	46.02
4	H	46	14.86	46.68
4.25	H½	47	15.09	47.41
4.5	I	47	15.27	47.98
4.75	J	48	15.49	48.67
5	J½	49	15.7	49.32
5.25	K	49	15.91	49.98
5.5	K½	50	16.1	50.58
5.75	L	51	16.31	51.24
6	L½	51	16.51	51.87
6.25	M	52	16.71	52.5
6.5	M½	53	16.92	53.16
6.75	N	53	17.13	53.82
7	N½	54	17.35	54.51
7.25	O	55	17.53	55.08
7.5	O½	55	17.75	55.76
7.75	P	56	17.97	56.46
8	P½	57	18.19	57.15
8.25	Q	57	18.34	57.62
8.5	Q½	58	18.53	58.22
8.75	R	58	18.69	58.72
9	R½	59	18.89	59.35
9.25	S	60	19.1	60.01
9.5	S½	60	19.35	60.8
9.75	T	61	19.56	61.46
10	T½	62	19.76	62.09
10.25	U	62	19.94	62.65
10.5	U½	63	20.2	63.46
10.75	V	63	20.4	64.09
11	V½	64	20.68	64.97
11.25	W	65	20.8	65.35
11.5	W½	65	21	65.97
11.75	X	66	21.18	66.54
12	X½	67	21.39	67.2
12.25	Y	67	21.69	68.14
12.5	Z	68	21.89	68.77
12.75	Z½	69	22.1	69.43
13	Z+1	70	22.33	70.15
13.5	Z+2	71	22.6	70.97

How to Measure Your Ring Size at Home

Print at 100% scale. Open the Printable Sizer tab and click “Print ring sizer.” In your print dialog, set Scale to 100%, Actual Size, or None — never “Fit to page.”
Verify the ruler bar. Lay a real ruler against the 100 mm calibration bar on the sheet. It must measure exactly 100 mm (3.94 in). If it does not, reprint and check your printer settings.
Cut out the strip. Use scissors to cut cleanly along the outer edges of the finger-measuring strip.
Wrap and read. Wrap the strip snugly around the base of the finger you plan to wear the ring on. Hold where it overlaps and read the US size at the arrow mark.
Confirm with the circle chart. Lay an existing ring over the circles. Find the one that lines up with the inside edge — that circle's label is your size.
If between sizes, go up. A ring that is slightly loose is easier to resize than one that is too tight.

Tips for an Accurate Measurement

Measure at the end of the day. Fingers swell slightly throughout the day and are at their largest in the evening — which is when you want the fit to be comfortable.
Measure when warm. Cold fingers can be up to half a size smaller. Measure in a warm room, or after light activity.
Avoid after exercise or swimming. Both can temporarily alter finger size.
Measure three times. Take three readings and use the largest.
Consider the knuckle. If your knuckle is noticeably wider than the base of your finger, size for your knuckle and choose a ring style with a comfort-fit band.
Wide bands fit tighter. If you are ordering a band wider than 6 mm, go half a size up from your measured size.

Frequently Asked Questions

How do I know my ring size without going to a store?

Use the Printable Sizer tab to print a calibrated measuring sheet, or use the On-Screen Sizer to match a ring you already own to an on-screen circle after a quick monitor calibration with a credit card.

How do I measure my ring size at home without a ring?

Print the sizer strip, cut it out, and wrap it around your finger. Read where the arrow meets the numbered scale. No ring — and no jeweller — needed.

What is the most accurate home method?

Printing the calibrated strip is the gold standard for home measurement. Always verify the 100 mm ruler bar with a physical ruler before trusting the printed sizes.

How do I convert a UK ring size to US?

Use the Size Converter tab. Quick reference: UK N½ ≈ US 7, UK L½ ≈ US 6, UK P½ ≈ US 8.

What if my size falls between two sizes?

Always choose the larger size. A ring that is slightly loose can be resized down more easily than one that is too tight, and a snug fit is less comfortable day-to-day.

Printable Ring Sizer

Print-Accurate Ring Sizer Sheet

On-Screen Ring Matcher

Step 1 — Calibrate your screen

Ring Size Converter