In the 1920s buttoned up, tucked in blouses were Out, and slip-over overblouses were In. Butterick produced a number of patterns for blouses in 1924, some of which appear in this illustration from Miroir des Modes below.
All these patterns also appeared in various issues of The Delineator in 1924. I've taken the descriptions in English from The Delineator, though in some cases the magazine published different pattern views than the ones on this page. 4993 and 5085 at the bottom left of the illustration appeared in winter issues of The Delineator and were described with long sleeves.
