This is a striped tank top from MUJI. It has a cute, natural MUJI-like feel. It has been used a bit. The size is 100, but I'm listing it as 90 because I think it would be mostly unwearable if you started wearing it from the 100 size period. It can be worn as a dress from the 80 size period. When you're 80, the armholes might be a little wide, so you can layer it with an undershirt, etc., for different looks.