I am 5'10 and usually order 1 size up from the model across all Shopbop items. I ordered a size 8 (model is in 6) and it was so tight, so I returned for a 10 and it was still so tight I gave to my friend who is usually a size Small and it was tight on her as well. Definitely go up 2-3 sizes for this brand
It's much smaller than expected - I usually wear size 4US, but I had to reorder in size 10 because the deep V was waaaaay too deep and the swimsuit felt too snug. Definitely size up. However it's a very cute swimsuit and great quality.