Brittany Straight Knitting Needles are available in two lengths: 10" (regular) and 14" (long). Both lengths are popular according to personal taste. Yarn gauge and project demands will determine your needs.
Birch Double Point Needles are available in three lengths: 5", 7 1/2" and 10", sold in sets of five.
Birch Crochet Hooks sizes include the size 7 step between G and H. This size is often useful for accurate gauge.

Birch Cable Needles come in a set of three that includes a small medium and large.
European metric sizes have been assigned corresponding US designations.
Sizing Chart
| Size |
Birch Crochet |
Birch Straight Needles |
Birch Double Points |
| 0 |
2.00m |
|
|
|
X |
|
|
| 1 |
2.25 |
|
|
|
X |
|
|
| 1 1/2 |
2.50 |
|
|
|
X |
|
|
| 2 |
2.75 |
|
|
|
X |
X |
X |
| 2 1/2 |
3.00m |
|
|
|
X |
X |
X |
| 3 (D) |
3.25 |
X |
X |
|
X |
X |
X |
| 4 (E) |
3.50 |
X |
X |
X |
X |
X |
X |
| 5 (F) |
3.75 |
X |
X |
X |
X |
X |
X |
| 6 (G) |
4.00m |
X |
X |
X |
X |
X |
X |
| 7 |
4.50 |
X |
X |
X |
X |
X |
X |
| 8 (H) |
5.00m |
X |
X |
X |
X |
X |
X |
| 9 (I) |
5.50 |
X |
X |
X |
X |
X |
X |
| 10 (J) |
6.00m |
X |
X |
X |
X |
X |
X |
| 10 1/2 (K) |
6.50 |
X |
X |
X |
|
X |
X |
| 10 3/4 |
7.00m |
X |
X |
X |
|
X |
X |
| 10 7/8 |
7.50 |
X |
X |
X |
|
X |
X |
| 11 (L) |
8.00m |
X |
X |
X |
|
X |
X |
| 13 (M) |
9.00m |
X |
X |
X |
|
X |
X |
| 15 |
10.00m |
|
X |
X |
|
X |
|
| 17 |
12.00m |
|
X |
X |
|
X |
|
| 19 |
15.00m |
|
X |
X |
|
|
|
| 35 |
20.00m |
|
X |
X |
|
|
|
|