This was the third bikini I designed, it does run small, so you may want to size up a bit. It’s all worked in a rib, with short row shaping in the bikini top.
With this bikini design, and the other more recent designs, I’ve tried to make them adjustable, so you can tighten or loosen it as needed. I use Cascade Fixation for the bikinis as it’s a mix of cotton and elastic, giving it a lot of stretch, but also being comfortable against the skin.
Yes, you can wear this swimming!