We can caculate the approx width for the raw material as following:

1.  Bag height  x 2 + Bottom depth x2  + edge 2

 2.For the bottom depth, usually it is 3cm, 3.5cm,4cm,4.5cm. That will be depending on your requirement.

3. For example

9*14cm ,bottom depth 3cm ----------raw material width = 14 *2 + 3*2+2=36cm

15*22cm, bottom depth 3cm--------raw material width=22*2+3*2+2=52cm

18*26cm, bottom depth 3cm---------raw material width=26*2+3*2+2=60cm

4. For 100m2 paper-plastic window raw material can make how many pcs bag?

9*14cm : 36*9cm=0.0324m2   100/0.0324=3086PC

15*22cm:52*15cm=0.078m2    100/0.078=1282PC

18*26cm: 60*18cm=0.108m2    100/0.108=925PC

5. But for A type bag, it has some difference.

9*14cm ,bottom depth 3cm ----------raw material width FOR POUCH BODY = 14 *2 +2=30cm

                             Raw material widht for pouch bottom= 3*2+1=7cm

15*22cm, bottom depth 3cm--------raw material width for pouch body=22*2+2=46cm

                             Raw material widht for pouch bottom= 3*2+1=7cm

18*26cm, bottom depth 3cm---------raw material width for pouch body=26*2+2=54cm

                             Raw material for pouch bottom=3*2+1=7cm