The listed price (550 yen) is for a set of 4. These are not new, so there may be some minor scratches, but there are no major scratches or damage. The dimensions are as follows: This is the standard size case. [Jacket Insertion Area] Height: 15cm Width: 13cm Thickness: 1cm [Overall Case] Height: 17cm Width: 13.5cm Thickness: 1.3cm