23 mm ring size

The 23 mm ring size, measured straight across the inside, is about a US 14. In the UK it is Z3, and in Europe 72, and the ring is 72.3 mm round the inside.

23 mm ring size in every system

23 mm ring size: every system
US and Canada	about 14
UK, Ireland, Australia	Z3
Europe (EU)	72
Japan and China	above 27
India	32 to 33
Italy, Spain, Switzerland	32
Across the inside	23.0 mm · 2.30 cm · 0.906 in
Around the inside	72.3 mm · 7.2 cm · 2.84 in

Every half millimetre is a little over half a US size, so a 22.5 mm or 23.5 mm ring is the next size down or up. All of these numbers are from the standard ring size conversion table.

See a 23 mm ring at its real size

1Match a bank card

The card works like a ruler: nothing on it is read or saved, and a driving licence works too. Only its height counts, so the drawing may run off the edge of a phone. Hold the card flat on the screen, long side across, with its top edge on the drawing's top line. Then move the slider until the drawing's bottom line meets the card's bottom edge.

Optional. Only needed to lay a ring or strip on the screen; typed measurements work without it. Nothing on the card is read or saved.

2Measure

A ring I own My finger Print a sizer

Inside diameter of your ring mm

Lay the ring on the circle, or type the inside diameter if you measured it.

Length of your paper strip mm

Wrap a thin strip of paper around the base of your finger, mark where it overlaps, then measure to the mark.

The circle shows a 17.3 mm ring, drawn for a typical screen.

This size, drawn on your screen

US14

UK Z3 · EU 72 · Japan above 27 · India 32 to 33

23.0 mm (0.91 in) across the inside · 72.3 mm (2.85 in) around

For a wide band (over 4 mm), go up about half a size, to US 14½.

See every size in the ring size chart · Convert a size you already know

Nearby sizes

Too tight or too loose? Try the size one row up or one row down.

Nearby sizes
US and Canada	UK and Australia	Europe (EU)	Inside diameter (mm)	Circumference (mm)
13	Z½	70	22.2	69.7
13¼	Z1	70	22.4	70.4
13½	Z1 to Z2	71	22.6	71.0
13¾	Z2	72	22.8	71.7
14	Z3	72	23.0	72.3
14¼	Z3 to Z4	73	23.2	72.9
14½	Z4	74	23.4	73.6
14¾	–	74	23.6	74.2
15	–	75	23.8	74.8

A dash means that country has no size for this ring. It happens only with the very smallest and very largest rings, which jewellers sell by their US or European size.

Your questions on a 23 mm ring

How long is the inside of a 23 mm ring, measured all the way round?

Round the inside it is 72.3 mm, which is 7.2 cm. Straight across, it is 0.91 inches.

Which US ring size matches 23 mm across?

It is close to a US 14. In the UK that ring is Z3, and in Europe 72.