These little back bows are the reason I loved this JSK! It can make the shoulders a little narrow, however. I wore it once, and when I did, I removed the back bows so they wouldn't bulge under my jacket!
The girl I bought the JSK from remade the little flower pin, which I removed when I wore it. I will include it, of course!
For reference, I am bust 35, waist 27.5, and this fit, albeit a bit snug in the bust. I would recommend slightly smaller than me for maximum comfort!