☆3B Gymnastics 3/4 Sleeve T-Shirt

This was purchased by my mother at home for 3B exercises. It is brand new and unused.
It has cute tucks at the chest (image 2).

Size L
Length: approx. 53 cm (measured flat)
Width: approx. 40 cm (please allow for slight errors)
Sleeve length: approx. 38 cm
Polyester 85%
Polyurethane 15%

It is labeled as size L, but it looks like a size M to me (^^;

This item has been stored at home, so please purchase only if you are satisfied with the listed price.
To ensure smooth transactions, please refrain from holding items or negotiating prices.
Thank you for your understanding.