Fairly substantial
These stamp pockets are fairly substantial, much more than some other companies. I love the fact that they are tabbed at the top, which makes it easy to see what product is in there. (Provided you label them of course!). However, I don't like the fact that they are open ended. This allows dust to get onto your stamps, and, if you're anything like me and don't stick your stamps back onto the backing sheet securely, then the stamps could fall out.