This was my first version of the Jalie 3134 Women's Racerback Swimsuit by Jalie, size W, in purple with black contrast and lining. It is a PERFECT fit and SOOO comfortable for swimming! It doesn't budge at all even with twisty swimming movements, yet isn't tight at all. Love it. I made a matching swim cap with my free pattern (which you can get here).
The one issue I had was with the elastic I chose for this first version, natural India rubber. I've heard that it's a good choice for swimwear, so maybe the one I used was bad quality, because it got brittle and broke apart all along all the edges, making it way too loose. I sewed another one exactly like this one with regular woven elastic and it's perfect.
Read my full review of the pattern here: www.cucicucicoo.com/2018/05/jalie-3134-racerback-swimsuit-pattern/