This item was received from a relative. Size: Approximately 25.5cm x 30.5cm No gusset The inside is double-layered with vinyl, possibly for waterproofing. It was stored in a plastic bag, but was taken out and opened for inspection this time. Although it is new and unused, it has been stored at home for a long time, so please understand that it is a used item. We appreciate your consideration. ☆☆☆ Price reduced ☆☆☆