Handy reference charts can be a jewellery designer's best friend. After all, the less you need to think about international standards and measurement conversions, the more you can focus on what really matters: designing and producing the perfect beaded accessory! Of course, you also want your sterling silver necklace, gold bracelet, bead anklet or gemstone ring to fit, too. From wire gauges and standard necklace lengths to metric/imperial unit conversion, we have you covered. Leave the math to us and let your creativity soar!

Inches	Millimetres
1/32	0.79
1/16	1.59
3/32	2.38
1/8	3.18
5/32	3.97
3/16	4.76
7/32	5.56
1/4	6.35
9/32	7.14
5/16	7.94
11/32	8.73
3/8	9.53
13/32	10.32
7/16	11.11
15/32	11.91
1/2	12.7
17/32	13.49
9/16	14.29
19/32	15.08
5/8	15.88
21/32	16.67
11/16	17.46
23/32	18.26
3/4	19.05
25/32	19.84
13/16	20.64
27/32	21.43
7/8	22.23
29/32	23.02
15/16	23.81
31/32	24.61

Size in Millimetres	Nearest Equivalent in Inches
1	1/32
2	1/16
3	1/8
4	5/32
5	3/16
6	1/4
7	9/32
8	5/16
9	11/32
10	3/8
11	7/16
12	15/32
13	1/2
14	9/16
15	19/32
16	10/16
17	11/16
18	23/32
19	3/4
20	13/16

Choker	16 Inches
Princess	18 Inches
Matinee	24 Inches
Opera	32 Inches
Rope	48 Inches

Gauge	Inches (Decimal)	Millimetres	Inches (Fraction)
1	0.289	7.348
2	0.258	6.543
	0.250	6.350	1/4
	0.234	5.953	15/64
3	0.229	5.827
	0.219	5.556	7/32
4	0.204	5.189
	0.203	5.154	11/64
	0.188	4.762	3/16
5	0.182	4.621
	0.172	4.366	11/64
6	0.162	4.115
	0.156	3.969	5/32
7	0.144	3.664
	0.141	3.572	9/64
8	0.128	3.263
	0.125	3.175	1/8
9	0.114	2.906
	0.109	2.778	7/64
10	0.102	2.59
	0.094	2.381	3/32
11	0.091	2.31
12	0.081	2.06
	0.078	1.984	5/64
13	0.072	1.83
14	0.064	1.63
	0.063	1.588
15	0.057	1.449
16	0.051	1.291
	0.047	1.191	3/64
17	0.045	1.14
18	0.04	1.02
19	0.036	0.91
20	0.032	0.81
	0.031	0.795	1/32
21	0.028	0.71
22	0.025	0.64
23	0.023	0.58
24	0.02	0.51
25	0.0179	0.455
26	0.0159	0.404
	0.016	0.396	1/64
27	0.0142	0.361
28	0.0126	0.32
29	0.0113	0.287
30	0.01	0.25
31	0.0089	0.226
32	0.008	0.2
33	0.0071	0.18
34	0.0063	0.16
35	0.0056	0.142
36	0.005	0.13
37	0.0045	0.114
38	0.004	0.1

US / Canada	British	Irish	Australian
1/4
1/2	A
3/4	A 1/2
1	B	1
1 1/4	B 1/2
1 1/2	C
1 3/4	C 1/2
2	D	2	1.5
2 1/4	D 1/2
2 1/2	E	3	2.75
2 3/4	E 1/2
3	F	4	4.00
3 1/4	F 1/2	5	5.25
3 1/2	G
3 3/4	G 1/2
4	H	7
4 1/4	H 1/2		7.75
4 1/2	I	8
4 3/4	J		9
5	J 1/2	9
5 1/4	K		10
5 1/2	K 1/2	10
5 3/4	L		11.75
6	L 1/2	11	12.75
6 1/4	M	12
6 1/2	M 1/2	13	14
6 3/4	N
7	N 1/2	14	15.25
7 1/4	0
7 1/2	0 1/2	15	16.5
7 3/4	P
8	P 1/2	16	17.75
8 1/4	Q
8 1/2	Q 1/2	17
8 3/4	R		19
9	R 1/2	18
9 1/4	S		20.25
9 1/2	S 1/2	19
9 3/4	T		21.5
10	T 1/2	20
10 1/4	U	21
10 1/2	U 1/2	22	22.75
10 3/4	V
11	V 1/2	23
11 1/4	W		25
11 1/2	W 1/2	24
11 3/4	X
12	X 1/2	25	27.5
12 1/4	Y
12 1/2	Z	26	28.75
12 3/4	Z 1/2
13		27
13 1/4	Z1
13 1/2
13 3/4	Z2
14	Z3
14 1/4
14 1/2	Z4
14 3/4
15
15 1/4
15 1/2
15 3/4
16

To Convert...	Into...	Multiply By...
centimetres	inches	0.394
	feet	0.0328
	metres	0.01
	millimetres	10
metres	centimetres	100
	feet	3.281
	inches	39.37
inches	centimetres	2.54
	feet	0.0833
	metres	0.0254
	yards	0.0278
yards	inches	36
	feet	3
	metres	0.914
grammes	ounces	0.035
	pounds	0.002
	kilogrammes	0.001
ounces	grammes	28.35
	pounds	0.0625
	kilogrammes	0.028
pounds	grammes	453.59
	ounces	16
	kilogrammes	0.454

Wire Guage	Acceptable Weight	Stretch-Causing Weight
26 dead soft	350g	400g
26 soft	450g	500g
26 half hard	600g	650g
26 hard	900g	1000g
24 dead soft	1250g	1500g
24 half hard	1700g	2000g
22 soft	4000g	over 4000g

Stone Size	Hole Diameter (mm)	Wire Guage #	Wrap Times
small	less 0.5	26	1
small	0.5 ~ 0.8	26	2 ~ 3
medium	0.8 ~ 1	24	1
medium	1.1 ~ 1.5	24	2 ~ 3
medium ~ big	1.6 ~ 1.8	22	1
medium ~ big	1.9 ~ 2.5	22	2 ~ 3
big	over 2.5	20	1 ~ 2