Find Your Ring Size

Getting the size right is the one thing that makes online ring shopping nerve-wracking. It doesn’t have to be. Here are the most reliable ways to find your size — then match your measurement to the chart below.

The most accurate way: a local jeweler

Any jeweler will size your finger in about two minutes — usually free and with no obligation. For an engagement ring or eternity band, where a precise fit matters most, this is the surest method. Note the size and order with confidence.

Measure a ring you already own

Take a ring that fits the correct finger and measure its inside diameter in millimeters with a ruler, then match it to the chart below. This is the most accurate at-home method.

Wrap a strip of paper or string

Cut a thin strip of paper (or use string), wrap it snugly around the base of the finger, and mark where it overlaps. Measure that length in millimeters — that’s your circumference — and find it in the chart below.

US ring size chart

Find your measurement in the chart. If you land between two sizes, choose the larger.

US size	Inside diameter (mm)	Circumference (mm)
4	14.8	46.8
4.5	15.3	48.0
5	15.7	49.3
5.5	16.1	50.6
6	16.5	51.9
6.5	16.9	53.1
7	17.3	54.4
7.5	17.7	55.7
8	18.1	57.0
8.5	18.5	58.3
9	18.9	59.5
9.5	19.4	60.8
10	19.8	62.1
10.5	20.2	63.5
11	20.6	64.6
11.5	21.0	65.9
12	21.4	67.2
12.5	21.8	68.5
13	22.2	69.7

Values follow the standard US/Canada ring-size scale, rounded to 0.1mm.

Tips for an accurate measurement

• Measure at the end of the day, when fingers are at their largest.
• Avoid measuring when cold — fingers shrink.
• The band should slide over the knuckle with a little resistance.
• Wider bands fit tighter — size up a quarter for bands over 6mm.

Still unsure?

Order close and let us perfect it: every Viviour ring includes free resizing in the first year. Surprising someone? Borrow a ring they already wear, or pick a popular size and we’ll resize after. Ready? Browse our in-stock rings.