KnitPro Basix Birch Circular Knitting Needles Birch 100cm 2.50mm / 39.4in US1½

2 mm / US 0

2.25 mm / US1

2.50 mm / US 1½

2.75 mm / US 2

3 mm / US 2½

3.5 mm / US 4

3.25 mm / US3

3.75 mm / US 5

4 mm - US 6

4.5 mm / US 7

5 mm / US 8

5.5 mm / US 9

6.00mm / 39.4in US10

6.5 mm / US 10.5

7.00mm / 39.4in US10¾

8.00mm / 39.4in US11

9.00mm / 39.4in US13

10.00mm / 39.4in US15

12 mm / US17

15 mm / US 19