I’m quite fond of Jalie patterns for active wear. I’ve only ever sewn the smaller child sizes, but I generally find the fit to be very good on my girls. I made this leotard up in a size 7 (years) for my nearly-Miss Seven. However, because it is destined to be a birthday gift, Miss Five agreed to model it for the photos.
Initially, I wasn’t sure if the tight leg elastic was just a mistake on my part with the first pair, but now I realise it is a feature of the pattern, and so probably worth considering if you are planning to sew these. As a reference point, Miss Five is tall, but apart from her height, she’s on the 50th centile for BMI and a perfectly standard size 5 on all her other body measurements (which has been very useful for me in my recent patternmaking!).