This is a compression shirt from Under Armour. * Brand: Under Armour * Category: Undershirt * Color: Navy * Size: The tag says "YMD," which means Youth Medium (Junior M size). Generally, "Youth Medium" is designed for heights of approximately 130-150cm (this may vary slightly depending on the manufacturer). The tag is missing because it was washed once, but it has never been used. No pets, no smokers.