Ring size 16 in mm, cm, UK and EU

Ring size 16 in the US means a ring 24.6 mm wide inside and 77.4 mm round. The UK calls the same ring above Z4, Europe 77, Japan above 27 and India 37.

Ring size 16 in every system

Ring size 16 in mm, cm, UK and EU: every system
US and Canada	16
UK, Ireland, Australia	above Z4
Europe (EU)	77
Japan and China	above 27
India	37
Italy, Spain, Switzerland	37
Across the inside	24.6 mm · 2.46 cm · 0.970 in
Around the inside	77.4 mm · 7.7 cm · 3.05 in

No US ring is bigger than a 16. One whole size smaller, US 15, is just under 1 mm narrower. All of these numbers are from the standard ring size conversion table.

Check a ring against ring size 16 on your screen

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

US16

UK above Z4 · EU 77 · Japan above 27 · India 37

24.6 mm (0.97 in) across the inside · 77.4 mm (3.05 in) around

US 16 is the largest standard size. For a wide band (over 4 mm), ask the jeweller about sizing up.

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)
15	–	75	23.8	74.8
15¼	–	76	24.0	75.5
15½	–	76	24.2	76.1
15¾	–	77	24.4	76.8
16	–	77	24.6	77.4

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.

Common questions about ring size 16

How many millimetres is US ring size 16?

It is 24.6 mm wide inside and 77.4 mm round the inside. In inches, the width is 0.97.

How many centimetres is US ring size 16?

Round the inside it is 7.7 cm, and it is 2.46 cm wide.