ID card, bank cards,such as IC magnetism card,putting into the bag can aviod magnetism lost and information leak.Mobile Phone Anti-radiation Bag is a good gift for your friends.Size: 5 3/4 x 3 3/4inch.( it may not fit all the phone, so you must care the size before buy this item ).Color: Black.Weight: 27g.Package Include:1 x Black Shielding Bag