2.4 Mil Thick Resealable Clear Zip Lock Bags 3 x 7 Inch (8X18cm) Pack of 100 Material: Plastic Measurements are Width x Height: 3'' x 7''( include area 'outside' of seal) Sturdy,2.4 Mil clear polyethylene, meets FDA food storage requirements. Many sizes also available with white writing block - check our other listings. These self zipping bags are ideal for protecting, sorting and selling bracelets, necklaces, larger beads, earrings and other items.