Thank you for viewing from among many items (*^^*)♪ This is a randoseru cover that came with the purchase of a randoseru (school backpack)♪ It's for use in rainy weather, but my child can't use it well, so I'm selling it. It's thin, so it didn't get in the way when kept in the small pocket of the randoseru. Randoseru size: Width 26cm x Height 36cm x Depth 18cm I use the above size, but there's extra room. I hope this is helpful as a reference.