Thank you for viewing! This is a handmade mini tote bag. It has a lining and an inner pocket. A smartphone can fit in the inner pocket. Interfacing is applied to the outer fabric. An A5-sized book will fit. How about using it as a sub-bag? Size (bag) Height: Approximately 24cm, Width: Approximately 21cm There may be slight variations. Kippis Oxford fabric is used. Please understand that this is a handmade item and purchase accordingly. #handmade #totebagmini #A5