Size Guide

Our table below outlines specifically which sizes are available at Moiss & Co. Take some time to study in. We use US sizes as our default.

Keep in mind most good jewellers will be able to resize a ring for you. If in doubt we recommend a slightly larger size so the ring fits and can be resized smaller. 

Size	Hong Kong size	US/Canada size	UK/Australian size	French size	German size	China-Japan Singapore size	Inner diameter (mm)	Inner circumference (mm)
4	HK 9	US Size 4	H	France 46.5	47 (15.0)	Size 7	15 mm	47.1 mm
4.5	HK 10	US Size 4.5	I	France 48	48 (15.3)	Size 8	15.3 mm	48.1 mm
5	HK 11	US Size 5	J	France 49.5	49 (15.6)	Size 9	15.6 mm	49 mm
5.5	HK 12	US Size 5.5	K	France 50.5	51 (16.2)	Size 10	16.2 mm	50.9 mm
6	HK 13	US Size 6	L	France 52	52 (16.6)	Size 11	16.6 mm	52.2 mm
6.5	HK 14	US Size 6.5	M	France 53	53 (16.9)	Size 12	16.9 mm	53.1 mm
7	HK 15	US Size 7	N	France 54.5	54 (17.2)	Size 13	17.2 mm	54 mm
7.5	HK 17	US Size 7.5	O	France 55.5	56 (17.8)	Size 14	17.8 mm	55.9 mm
8	HK 18	US Size 8	P	France 57	57 (18.1)	Size 15	18.1 mm	56.9 mm
8.5	HK 19	US Size 8.5	Q	France 58	58 (18.5)	Size 16	18.5 mm	58.1 mm
9	HK 20	US Size 9	R	France 59.5	60 (19.1)	Size 17	19.1 mm	60 mm
9.5	HK 21	US Size 9.5	S	France 61	61 (19.4)	Size 18	19.4 mm	60.9 mm
10	HK 22	US Size 10	T	France 62	62 (19.7)	Size 19	19.7mm	61.9 mm
10.5	HK 24	US Size 10.5	U	France 63.5	64 (20.4)	Size 20	20.4mm	64.1 mm
11	HK 25	US Size 11	V	France 64.5	65 (20.7)	Size 21	20.7 mm	65 mm
12	HK 27	US Size 12	X	France 67	68 (21.6)	Size 23	21.6 mm	67 mm