Our unisex sizing is simply one size down for women. For example, if you wear a women's M, you wear a S in your Tombolo.
Lili is 5'7'' with a 24" waist and 31" bust. She is wearing a XS in all of the photo references on this page. This is a classic fit, drapey and relaxed, offering versatility to wear tucked or untucked, cinched and tied at the waist, open as a cover-up, or even buttoned up into a kimono-style top. With Lili's dimensions, if she wanted a snugger, form-fitting look, XXS would work; on the other hand, if she wanted to use her shirt predominantly as a loose-fitting cover-up, she might consider S.
In general, the shirt is versatile size-wise, as we've meticulously designed the fit with a team of unisex sizing consultants. If you have any questions at all about your particular sizing, styling, or otherwise, reach out to firstname.lastname@example.org and we'll get back to you ASAP.