Japan Pokémon Center uses free size for a lot of items. My best guess is it's around XL unisex. Shit is sealed in plastic.

Size - 70×54×0.5:cm 234g

Length 70cm

Width 54cm

Catch 'em all with this awesome long t-shirt from the Pokemon Center Japan! Featuring characters from the Pokemon franchise, including Vileplume, Pecha Berry, Toxel, Clodsire, Mareanie, Gulpin, and more, this white shirt is made of comfortable cotton and in free size. Perfect for fans of the TV show, movies, and video games.

In addition to the shirt, this package also includes an action figure model of a Toxic Type Pokemon. Manufactured in Japan in 2024, this original licensed reproduction is a must-have for any fan of the series. Don't miss out on this amazing opportunity to show your love for Pokemon!