This is a light blue hat made of breathable mesh material, used in nursery schools and kindergartens. The size is unknown. - Color: Light blue - Inner color: Yellow - Material: Mesh - Manufacturer: Hikari no Kuni Thank you for viewing. I used this for only one year after my child entered at the age of 3. There are no noticeable stains, but please understand that this is a used item before purchasing. I will pack it as compactly as possible for shipping. Thank you for your understanding. * I am not considering any further price reductions for this item. If you are looking for a discount, please take advantage of the occasional time sales. If you have any other questions, please feel free to comment (*´꒳`*)