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Needle Sizes

Knitting Needle Size Conversion Chart

Metric Size US Size UK Size
2 mm 0 14
2.25 mm 1 13
2.5 mm    
2.75 mm 2 12
3 mm   11
3.25 mm 3 10
3.5 mm 4  
3.75 mm 5 9
4 mm 6 8
4.5 mm 7 7
5 mm 8 6
5.5 mm 9 5
6 mm 10 4
6.5 mm 10 ½ 3
7 mm   2
7.5 mm   1
8 mm 11 0
9.0 mm 13 00
10 mm 15 000
12 mm 17  
16 mm 19  
19 mm 35  
25 mm 50  


Crochet Hook Size Conversion Chart - Standard

Metric Size US Size UK Size JPN Size
2 mm A-0 14 0
2.25 mm B-1 12  
2.5 mm   12 1
2.75 mm C-2   2
3 mm   11 3
3.25 mm D-3 10 4
3.5 mm E-4 9 5
3.75 mm F-5   6/7
4 mm G-6 8 7
4.5 mm 7 7 8
5 mm H-8 6 10
5.5 mm I-9 5 11
6 mm J-10 4 13
6.5 mm K-10 ½ 3 15
7 mm   2  
8 mm L-11 0  
9 mm M-13 00  
10 mm N-15 000  

approximate


Crochet Hook Size Conversion Chart - Steel

Metric Size US Size UK Size JPN Size
0.5 mm     14
0.6 mm     12
0.75 mm 14   10
0.9 mm 13 7 8
1.00 mm 12 6 ½ 6
1.25 mm 10 5 ½ 4
1.50 mm 8 4 ½ 2
1.75 mm 6 3 ½ 0
2 mm 4 2 ½  
2.25 mm 2 1 ½  
2.5 mm      
2.75 mm 1 1  
3 mm      
3.25 mm 0 0  
3.5 mm 00    

approximate