This is a backpack from the Ace fukubukuro (lucky bag). The back is mesh, so it's very breathable! 【Size】 Height: Approximately 30cm Width: Approximately 42cm Depth: Approximately 15cm Please note that these measurements are approximate and may have slight variations. Due to its size, I plan to fold it in half for shipping. Please consider this item as a home-stored item, and understand this before purchasing.