The navy item is approximately 18cm square, and the mint item is approximately 21cm square. The navy item has been used a few times, and the mint item has been used around 10 times. Please purchase only if you understand that these are used items that have been washed and stored at home, and that they have been inspected and measured by a non-professional. Please note that there may be creases when packaging to reduce thickness. Also, as this is a private transaction, we cannot accept claims or returns after purchase or receipt. Thank you. When considering a purchase, we would appreciate it if you could read the profile.