Ring Size Guide

Every Trillobeat ring is cast to order in your chosen size, so getting the size right matters. Here are three ways to find it.

1. Measure a ring you already wear

This is the most reliable method. Take a ring that fits the finger you have in mind, lay it flat, and measure the inside diameter across the widest point in millimetres. Match that number to the table below.

2. Measure your finger

Wrap a strip of paper or a piece of string snugly around the base of your finger. Mark where it overlaps, lay it flat against a ruler, and read the length in millimetres. That is your circumference.

Measure at the end of the day, when fingers are at their largest, and at room temperature. Cold fingers can read a full size smaller.

3. Ask us

If you are between sizes or buying as a gift and cannot measure, write to us. Tell us what you know and we will help you decide.

Size chart

US / Canada	Inside diameter	Inside circumference
4	14.9 mm	46.8 mm
4½	15.3 mm	48.0 mm
5	15.7 mm	49.3 mm
5½	16.1 mm	50.6 mm
6	16.5 mm	51.9 mm
6½	16.9 mm	53.1 mm
7	17.3 mm	54.4 mm
7½	17.7 mm	55.7 mm
8	18.1 mm	57.0 mm
8½	18.5 mm	58.3 mm
9	18.9 mm	59.5 mm
9½	19.4 mm	60.8 mm
10	19.8 mm	62.1 mm
10½	20.2 mm	63.4 mm
11	20.6 mm	64.6 mm
11½	21.0 mm	65.9 mm
12	21.4 mm	67.2 mm
12½	21.8 mm	68.5 mm
13	22.2 mm	69.7 mm

A note on wide bands

Wide or heavily textured rings sit tighter than thin ones. If the band you are ordering is 8 mm or wider, consider going up half a size.

If the size turns out wrong

Because each piece is made to order, we would rather get it right the first time than resize afterwards. If something does not fit, get in touch and we will work out a solution with you.