“W” denotes a White Block, which enable writing on the bags

Size Weight Pack
2 x 3 2.5 1M
2 x 3 W 2.5 1M
2.5 x 3 3.2 1M
2.5 x 3 W 3.2 1M
3 x 4 4.9 1M
3 x 4 W 4.9 1M
3 x 5 5.7 1M
3 x 5 W 5.7 1M
4 x 4 6.2 1M
4 x 6 8.6 1M
4 x 6 W 8.6 1M
4 x 8 10.7 1M
5 x 8 13.6 1M
5 x 8 W 13.6 1M
6 x 4 8.9 1M
6 x 6 13.1 1M
6 x 8 16.0 1M
6 x 8 W 16.0 1M
6 x 9 18.1 1M
6 x 9 W 18.1 1M
6 x 10 21.3 1M
8 x 8 22.0 1M
8 x 10 26.5 1M
8 x 10 W 26.5 1M
9 x 12 34.6 1M
9 x 12 W 34.6 1M
10 x 10 32.8 1M
10 x 12 38.8 1M
12 x 12 46.7 1M
12 x 15 56.7 500
13 x 15 30.5 500
13 x 18 36.3 500
14 x 20 41.0 500