User Type: Trail Running, Full Marathon, Kids/Juniors, Men's Clothing Size: M This is an Under Armour top. Although it doesn't have tags, it's in almost new condition. It's red and very eye-catching. The size is SM. I think it's a size that elementary and junior high school children can definitely wear. I think it's best for those under 160cm. If you have any questions, please let me know in the comments. Thank you.