Needle Size Conversion Chart

U.S. Size

U.K./U.S. Metric Size

European Metric Size

Old U.S. Size

U.K.

8/0

.5 mm

.5 mm

NA 24

6/0

.75 mm

.75 mm

NA

22

NA

NA .875 mm (?) NA

20

5/0

1.0 mm

1.0 mm

18 (steel dpn)

19

NA NA 1.125 mm 17 (steel dpn) NA

4/0

1.25 mm

1.25 mm

16 (steel dpn)

18

000

1.5 mm

1.5 mm

15 (steel dpn)

17

NA

NA

1.625 mm (?)

NA

16

00

1.75 mm

1.75 mm

14 (steel dpn)

15

0

2 mm

2 mm

0 (standard needles)
13 (steel dpn)

14

1 2.25 mm 2.25 mm 12 (steel dpn) 13

1

2.5 mm

2.5 mm

1 (standard needles)

NA

2 2.75 mm 2.75 mm 2 (standard needles)
11 (steel dpn)
12
2 3 mm 3 mm 3 (standard needles)
10 (steel dpn)
11

3

3.25 mm

3.5 mm

10

4

3.5 mm

3.5 mm

4 (standard needles)
9 (steel dpn)

NA

5

3.75 mm

3.75 mm

5 (standard needles)
8 (steel dpn)

9

6

4 mm

4 mm

8

NA 4.25 mm 4.25 mm 6 (standard needles) NA

7

4.5 mm

4.5 mm

7

NA 4.75 mm 4.75 mm 7 (standard needles) NA

8

5 mm

5 mm

8 (standard needles)

6

NA 5.25 mm 5.25 mm 9 (standard needles) NA

9

5.5 mm

5.5 mm

5

NA 5.75 mm 5.75 mm 10 (standard needles) NA

10

6 mm

6 mm

4

10 1/2

6.5 mm

6.5 mm

10 1/2 (standard needles)

3

7 mm

7 mm

2

7.5 mm

7.5 mm

1

11

8 mm

8 mm

0

13

9 mm

9 mm

00

15

10 mm

10 mm

000

17

12.5 mm

18

14 mm

19

15.5 mm

35

19 mm

50

25 mm




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