With more than 50 brands to choose between, this retailer makes it shockingly easy to find what you're looking for. Not only can you search by brand, style, or color, you can also shop suits within a certain price range or by body type—like "full midsection" or "small hips"—a feature we haven't seen anywhere else.

canyonbeachwear.com

This site has the top designers in the luxury swimwear market, such as Tomas Maier, Rosa Chá, and Chio di Stefania. Need a suit for a last-minute weekend getaway? Orders placed Monday through Friday will ship within 24 hours.

catrionamackechnie.com

It helps to see a suit from many angles, and couturecandy.com smartly photographs models from front, side, and back views as well as a zoomed-in detail shot. They carry a great range of names, from São Paulo–based Poko Pano to notable up-and-comers like Syla by Sylvie Cachay, created by a former Victoria's Secret designer.

couturecandy.com

In the incredibly useful "swimwear knowledge" section of this site, you'll discover definitions for terms like "shirring" and "floating underwire," which come in handy when reading the descriptions of the suits on offer—from lines including Vitamin A, Anne Cole, and Diva, among others. There's also an entire section filled with tops and one-pieces made to fit larger busts.

everythingbutwater.com

Search separates or sets by color, price, or style. You'll discover more than 40 swim-centric brands here, many of them new or hard to find elsewhere, like Mimi Holliday, Fifi Chachnil, and Oskalily. There's next-day delivery service for buyers in the continental U.S. and a helpful product review section, so you can see what other customers have to say before you buy.

figleaves.com

This company is deservedly famous for its flirty-but-classic bikinis and one-pieces, and every style comes in a rainbow of colors and patterns—from muted florals to sweet seersucker stripes. We particularly like the "build your own two-piece" feature, where you choose any top and any bottom, and see how they look together on a model.

jcrew.com