Sizing Guide

As all our pieces at RiiDesign are handmade to order, we can customise your piece to suit your exact size (unless noted otherwise). However we do offer standardised sizing options which you can use as a guide:

Small | AUS size L 
Medium | AUS size N 
Large | AUS size P 

Please see below our ring size guide. At RiiDesign, we base our ring sizes off our Australian Measuring Tools. If you are an international customer, please take note of the internal diameter measurements if in doubt. 

Should you require a custom size, please select 'Custom Ring Size' on the product page. And add your size in the 'notes' section of a product page. 

Please take care when specifying your size, if the wrong size is ordered and the piece requires resizing, a resizing fee applies - this varies from piece to piece.

 RiiDesign Jewellery Size (Australia / UK) Inside Diameter (mm) USA / Canada Size
D 13.1
D 1/2 13.3 2
E 13.5
E 1/2 13.7 2.5
F 13.9
F 1/2 14.1 3
G 14.3
G 1/2 14.5 3 1/2
H 14.7
H 1/2 14.9 4
I 15.1
I 1/2 15.3 4 1/2
J 15.5
J 1/2 15.7 5
K 15.9
K 1/2 16.1 5 1/2
L 16.3
L 1/2 16.5 6
M 16.7
M 1/2 16.9 6 1/2
N 17.1
N 1/2 17.3 7
O 17.5
O 1/2 17.7 7 1/2
P 17.9
P 1/2 18.1 8
Q 18.3
Q 1/2 18.5 8 1/2
R 18.8
R 1/2 19 9
S 19.2
S 1/2 19.4 9 1/2
T 19.6
T 1/2 19.8 10
U 20
U 1/2 20.2 1O 1/2
V 20.4
V 1/2 20.6 11
W 20.8
W 1/2 21 11 1/2
X 21.2
X 1/2 21.4 12
Y 21.6
Y 1/2 21.8 12 1/2
Z 22
Z 1/2 22.2 13
Z+1 22.4
Z+1 1/2 22.6 13 1/2
Z+2 22.8
Z+2 1/2 23.95 14
Z+3 23.15