Waterbed Mattress Sizes

The Size of a Hardside Waterbed is unique and not the same as a conventional mattress The size of a hardside waterbed is determined by measuring the inside of the wood frame that surrounds the vinyl water bladder. Hardside waterbed sizes are unique, and do not correspond to the sizes of conventional mattresses.

Waterbeds come in two varieties and each has its own sizing. A hardside waterbed has wood sides that form a frame, which serves to contain the vinyl safety liner and the water filled mattress bladder.

When measuring the size of a hardside waterbed mattress, you measure the inside of the waterbed frame. Because the length of a King, Queen and Twin hardside waterbed is greater than that of standard mattresses, hardside waterbeds are sometimes distinguished as California King, California Queen and Super Single.

  • King Waterbed: 72" x 84"
  • Queen Waterbed: 60" x 84"
  • Super Single Waterbed: 48" x 84"
  • It is impossible to use standard sheets on a hardside waterbed due to the difference in sizes between conventional bedding sizes and hardside waterbed sizes. For this reason, waterbed sheets can be very difficult to find at local retailers. Please don't drive yourself crazy trying. Our Waterbed Sheets are reasonably priced and constructed with great quality and craftsmanship.

    A softside waterbed mattress looks just like a traditional innerspring mattress, and comes in the same sizes. When you purchase a softside waterbed you can enjoy all the warmth and comfort of a hardside waterbed, without the hardside rails! You can replace your conventional mattress with one of our featured softside waterbeds and keep your current headboard, footboard and conventional bed linens while still enjoying the warmth and pressure free comfort of a softside waterbed.

  • Twin Softside: 39" x 75"
  • Double Softside: 54" x 75"
  • Queen Softside: 60" x 80"
  • King Softside: 76" x 80"
  • Cal King Softside: 72" x 84"
  • Because a softside waterbed mattress weighs more than a typical innerspring, you will need a heavy duty universal waterbed foundation with a heavy duty 9 leg bed frame or a platform frame to support the weight of your softside waterbed mattress. Click Here to view our selection of softside waterbed foundation options.

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    waterbed mattresses
    Softside waterbeds resemble standard mattresses but use water as the source of contouring support. The bladder is zipped inside a mattress cover and held in place by a perimeter of support foam.


    HARDSIDE waterbed mattresses
    A hardside waterbed mattress is a large water bladder that sits inside a wood frame to help the mattress keep its form. Available in three sizes: California King, California Queen and Super Single.


    WATERBED supplies and parts
    Blue Magic brand waterbed conditioner, waterbed parts and waterbed supplies are all available from Boyd Flotation, the direct manufacturer of all Blue Magic waterbed products.


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