Swim Systems Swimsuits | The Ultimate "Cali-Girl" Swimwear Looks Swim Systems swimsuits is the ultimate "cali-girl" swimwear look. But, you'll love the fit as much as the look. Buying swimwear for bigger busts makes a huge difference if you've got a D cup size or up. It can be impossible to find swimwear for large busts in your local department store. Treat your body to appropriately bra sized swimwear, and see just how great you can look the next time you go to the pool or beach.