The shirt is meant to fit like a second skin. Its not really a loose t-shirt design and will show off your curves and natural shape.
If you would like to know about the significance of the art that is printed on this top, you can read about it here https://www.leomdesigns.com/art-stories/
It is tailored in along the waist and gets bigger around the hips, embellished with elastic rouching around the bottom. It accentuates the female curvy form and will even give the appearance of such even if you do not have an hourglass form and want to give a lil' hip action to a more boyish frame. Yet if you feel a lil' extra squishy in the mid section, it may not be able to wave its magic wand all the way other than helping you embrace the way you are right now regardless of this shirt being perfect for you or not ;) The darker colors will always be more forgiving.
XS bust 30” - 34” waist 26” - 30”
S bust 32” - 36” waist 28" - 32”
M bust 34” - 38” waist 30” - 34”
L bust 36”- 40” waist 32” - 36”
I have had some women concerned about the bra line in the back. I have always had good luck with finding a bra that either looks cute and can peak out a little or finding the one that sits low on the back so it remains invisible. So I am sure you will be able to find one that’s a good match.