These sit inside a rigid wooden frame. They require specialized California-sized sheets (Super Single, Queen, or King) that are specifically designed for the bladder's dimensions.
Standard department stores rarely carry these sizes. Look for these specific measurements when buying online: Where I Can Buy Waterbed Sheets Guide │Wholesale Beddings buy waterbed sheets
Because waterbed mattresses move (the "wave action"), hardside sheets often include features to prevent them from slipping off: These sit inside a rigid wooden frame
Purchasing waterbed sheets requires more precision than buying for a standard mattress because of unique sizing and specialized attachment systems. If you have a traditional waterbed (with a wooden frame), standard sheets will not fit. 1. Identify Your Waterbed Type Look for these specific measurements when buying online:
These are triangular fabric pockets at the corners of the fitted sheet. You insert a plastic or wooden pole into the sleeve, which then tucks under the mattress. The weight of the water holds the pole and sheet firmly in place.