Topshop typically runs small in my opinion! I would size up if you’re unsure about what size to get.
Montce suits are pricey, but incredibly high quality! The material is thick and substantial and will last forever. I also love mixing and matching their patterns and solids to make multiple suits.
Aerie is a great go-to for simple styles! Prices are amazing and I love that they’re committed to showing all types of models.
Nasty Gal swimsuits are trendy and affordable which I love. They definitely run small! Size up 1-2 sizes. They also tend to sell out super fast, so make sure to snag something if you like it!
L*SPACE has been my go-to for years! The suits are high quality, the fit is amazing and I love their high waisted bottoms.
Frankie’s definitely run small. Size up 1-2 sizes in the bikinis for sure. They have the cutest styles and a good mix of cute + sexy. My all-time fav one piece is from them and linked below!
Superdown is one of the brands under Revolve’s umbrella. They have super cute, trendy suits at a great price point! The shipping is also insanely fast if you’re ever in a pinch.
Stone Fox Swim always has the best patterns! So many fun styles and I love the fit of their suits.
UO has so many cute styles at an amazing price point! Fit is true to size in my opinion!
And a few others that I love:
437 Swim, Skatie Swimwear, LaHana Swim, TJ Swim, Vincija Swim, Gooseberry Swim