These are slightly thicker zip-lock bags. The size is 85mm wide x 120mm deep. I think it's the perfect size for storing screws and small items. They are sold in a 2-pack/set. Features: Zip-lock closure that can be sealed with one touch. Material: PE (Polyethylene) Thickness (mm): 0.08 Width x Below Zip (mm): 85 x 120 Quantity: 200 bags x 2 packs