Specifications: 100 pieces foil bag Outer size: 2.76x3.94 inch(7x10cm) ; usable size: 2.36x2.76 inch(6x7cm) Color: Matte Black ; 3.54 mil(0.09 mm) thick one side Feature: This bag have a self-sealing closure, which can be resealed and reused ; flat ; with tear notch ; heat sealable Usage: This foil bag is perfect for food packaging. Such as candy, coffee powder, sugar, seeds, spices. And also great for packing jewelry, small parts, coins, ear rings and so on black mylar bag