Ring Size Chart

The general ring size chart

Use this chart as a starting point, not as a promise from any brand. Each row shows the finger circumference that usually fits that US ring size, with the matching UK and EU sizes beside it. The rows are spaced in half sizes, so a small change in circumference can move you into the next row. If your number sits near the edge of a row, read the next sections before you settle on a size.

Measure your finger first, then look at the chart, rather than starting from the size you usually wear. A finger can change by a small amount with temperature and time of day, and a knuckle difference can do the same even when the base has not changed. Fresh numbers keep the chart honest and stop you ordering the same wrong size twice. Our how to measure ring size guide walks through the steps.

Chart table in millimetres

The table above lists US ring sizes from 3 to 13, with finger circumference in millimetres and the matching UK and EU sizes. Read the circumference column as a centre point for each row, because a number between two rows needs a choice. When that happens, your knuckle, your band width and your fit will help you choose between the two rows. These are broad general ranges, and brands grade differently, so always check the brand chart for the ring you are buying.

How to read the chart when circumference falls between rows

Most people find that their circumference falls neatly near one row, but some fall halfway between two rows. When that happens, think about the knuckle first. A knuckle much wider than the base usually needs the larger row, because the ring must clear it, while a smooth finger can often stay in the smaller row without feeling cramped.

Band width matters too. A wide band covers more of the finger and can feel tighter, which makes the larger row safer when you are between sizes. A narrow band touches less skin, so a between row finger in a narrow band may stay in the smaller row. If you are choosing between two rows, lean toward the larger row when the band is wide and toward the smaller row when it is narrow, and check the return policy before you commit.

US, UK and EU sizes in the chart

US ring sizes in the chart run from 3 to 13, and they move in half size steps, so each step adds about 1.3 mm of circumference. The UK sizes run from F to Z in single letters, and the EU sizes run from 44 to 70, which are close to the circumference in millimetres. These are broad general equivalents, and some brands use slightly different conversions, so treat the numbers as a guide rather than a fixed rule.

When you order from a brand that uses UK letters, check whether it lists the letter alone or the letter with a fraction, because some UK charts split letters into halves. When you order from a brand that uses EU numbers, compare the EU number with your circumference in millimetres, because the two are close but not always identical. Our ring size conversion chart sets out the same rows in conversion order.

Width and fit change what the row means

A chart row is built around an average band, so a wide band can feel tight in the row that matches its circumference, and a comfort fit band can feel loose in the same row. If your finger is between rows and the band is wide, look at the larger row before you order, because sizing up adds the room the wide band takes away.

Fit changes the feeling too, because a comfort fit band has a rounded inner edge that touches less of the finger, while a standard fit band has a flat inner edge that sits against the full width. Use the chart row as your starting size, then let band width and fit guide whether you adjust the size or the band rather than the number itself. Our comfort fit versus standard fit guide covers the inner edge side of this choice.

What the chart cannot tell you

The chart also cannot tell you how a ring will feel after hours on your finger, since band width, fit and metal weight all shape comfort. Keep the chart as a map for size, and let the brand chart, the band width and the fit guide the rest of the choice. If you want a starting size worked out from your own measurement, use the ring size calculator and compare its result with the chart here.