This is a sub-pouch for smartphones that can be attached to the shoulder strap of a backpack. It's convenient when you want to take out your smartphone without taking off your backpack, such as when traveling, at theme parks, or shopping with children. The pouch has been modified to be fixed to the strap. Detachable strap included. For backpack shoulder straps. Size: Height: Approximately 16cm Width: Approximately 11cm Can store standard smartphone sizes. Condition: This is a handmade item, so there may be minor sewing imperfections and individual differences. Please refrain from purchasing if you are looking for a perfect product. Uses: Travel, USJ, Disney, walks, theme parks, photography, train travel, outdoor activities Shipping: Will be shipped in simple packaging.