I made myself a vintage 1920s swimsuit using Vintage Fashion Library 145, which is a reproduction of Simplicity 7041:
I made the one-piece with scoop back, using some lightly textured, black swimwear fabric and matching white fabric for a contrast belt. The repro is a B38, so I needed to grade it down to fit me. I didn’t alter the length of the shorts, only the belt and straps. I added white topstitching along the top and bottom edges of the bodice, with contrasting black topstitching on the white belt.
My wife took some photos of me in the suit at Sunnyside Bathing Pavilion in Toronto’s west end. Worn with a coverup, it’s almost indistinguishable from a playsuit:
I was able to cheat and sew the 1″ buttons directly through the straps:
And yes, you can swim in it! I’m considering making the low-backed view in a lighter swimwear fabric for next summer… I’ve posted more details at my blog, PatternVault.