Waterproof on a plated piece means the finish is built to survive a rinse, not that the piece is sealed. The plating sits over a brass core; fresh water does little to it, salt and chlorine sit on the surface and keep working until they are rinsed off, and it is the drying afterwards that decides how the chain looks in a month. Swim in it, then rinse it under the tap and pat it dry.
Most of this page is anklets and bracelets, which is not an accident: those are the pieces that go into the sea while a necklace stays on a towel. The initial anklets run A to Z at 9.5 inches with an extender, and the layered chain anklet sits at 8.3 inches, which is the difference between resting on the ankle bone and sitting just above it.
The $3.99 to $13.99 on this page and the prices across the CAROVO catalog were updated together, so they compare fairly.
Questions