Medium Boy
Medium Boy fashion dolls are more slender than Large boys, but more muscular than Slimline. I think of this as a swimmer's build type of body.
Dolls that can be clothed with these patterns at 100% are EAH, Descendant and prince dolls, Namu/Taeyang, 27cm Slim Obitsus, Slim fashionistas, and Kpop male fashion dolls
At 108%, they fit the new "Original" fashionistas size, but some patterns marked "Original edition" have been pre-resized so you don't have to enlarge them to sew.