Size Chart (HK)

HK Size	Diameter in mm	Circumference in mm	AU & NZ Size	US Size
8	14.8	46.5	H	4.0
9	15.2	47.7	I	4.5
10	15.5	48.7	J	4.8
11	15.9	49.9	K	5.3
12	16.2	50.9	K1/2	5.8
13	16.6	52.1	L1/2	6.0
14	17.0	53.4	M1/2	6.5
15	17.3	54.3	N1/2	7.0
16	17.6	55.3	O	7.3
17	18.0	56.5	P	7.8
18	18.4	57.8	Q	8.3
19	18.7	58.7	R	8.8
20	19.1	59.9	S	9.0
21	19.4	60.9	S1/2	9.5