You are buying plastic bag for your craft idea.These clear poly bags are great for jewelry, accessories and etc*No Flap..This is not resealable bag. (You need to use tape or twist tie to close on top.)*Demension..4 " X 6"(100mm X 150mm)*Thickness..0.04mm=40 micron=1.6 mil=very thick..not the cheap kinds bagThank you for shopping.