The size is listed as L, but it doesn't feel that big. I think it can be worn by both boys and girls in the upper grades of elementary school. Measurements by a amateur: Length 65cm x Width 50cm The material is nylon on the outside and cotton on the inside, and because it's double-layered (no padding), the fabric is quite durable and the construction is solid. I think it will be warm even in the fall. There are many pockets. I hope to sell it to someone who understands that it is a used item.