This is a reversible bikini and it doesn't have the tags anymore BUT it fits a medium, I had an 34A-34B cup when wearing the top and wore size 4 pants. So maybe a small. I don't know the brand, but I got it from Dillard's. Did some research of others and I’m 99.9% sure it’s raisins brand. Awesome suit but have too many now, trying to down size. Please comment with any questions, and thanks so much for looking!! 😊