The backside of this pocket pouch has a 4″ width but it can be any length you desire. I made mine at 5.5″, 10″ and 12″. For the shorter length with flap I scored at 5.5″ and 5.75″, mostly to hold hot chocolate packets.
For the 12″ matchbook style pocket pouch I scored at 1″, 6.5″ and 6.75″.
The pocket width in general can be adjusted as desired, just remember to add one inch to each side for scoring your accordion fold and adjust your backside width to fit.