Cut a strip of some lovely paper, the length of the pocket opening, width about 1"1/2 - 30mm or more.
Roll it lengthwise, it might be easier to do this using a skewer or similar.
Leave about half inch straight, hanging off. This is the bit where you put the glue so you can attach the roll to the inside of the pocket front.
There is an example of this here:
The rolls might flatten over time, but they will still help. You can use the rolls for further embellishments too, e.g. drawing fibers through them and all sorts!