Vintage Japanese Luccica Dress, Free Size

Stunning dress from the amazing Japanese brand Luccica. (they seriously had the best dresses back in the early 00s!) This is "free size" or one size fits.. most Japanese women I guess? I'd say it's a XS/S but I can't be sure. Here are the stats, measured flat: Pit to pit: 15" Length: 31.5" Shoulder hem to shoulder hem (like, if this didn't have sleeves, the area from the outside hem): 13" Waist: 13.5~14"