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Super Single Waterbed Dimensions

Super single waterbeds were a staple of the waterbed boom, and they remain popular among enthusiasts who love the feel and classic wooden-frame waterbed design. Because waterbeds use their own sizing system, understanding the exact dimensions is essential when buying a replacement mattress, liner, heater, or bedding.

What Are the Dimensions of a Super Single Waterbed?
A super single waterbed measures:
Width: 48 inches
Length: 84 inches
Height/Depth: Typically 9 inches (varies slightly by manufacturer)

These dimensions apply to hardside waterbeds, which use a rigid wooden frame to contain the vinyl waterbed bladder.

Why Super Single Waterbeds Have Unique Dimensions
Waterbeds don't follow standard mattress sizing. Instead, their dimensions are based on the inside measurements of the wooden frame that holds the water-filled bladder.
This is why:
A super single is longer than a standard twin (75")
It is narrower than a full-size waterbed
It is not interchangeable with any modern mattress size.

Components That Must Match Super Single Dimensions
Because waterbeds rely on a precise fit, several components must be purchased in super single size:
Waterbed mattress or bladder: Must be exactly 48" x 84" to fit the frame.
Safety liner:
Designed to catch leaks; must match the mattress size.
Waterbed Heater:
Not size-specific, but must be compatible with hardside waterbeds.
Waterbed Mattress pad:
Super single waterbed pads are specially cut to fit the longer, narrower shape.
Waterbed Sheets:
Standard twin sheets will not fit; super single sheets are required.

Types of Super Single Waterbed Mattresses
Super single waterbeds come in several motion levels:
Free-flow (full motion) - classic wave effect
Semi-waveless - partial stabilization
Waveless - fiber layers reduce movement
Ultra-waveless - nearly no motion
The dimensions remain the same regardless of motion type.

Super single waterbeds remain a favorite for people who enjoy the classic waterbed feel in a compact size. Their 48" x 84" dimensions make them unique, so choosing the correct size for replacement parts is essential. Whether you're restoring a vintage frame or maintaining a long-loved bed, understanding these dimensions ensures a perfect fit and a comfortable night's sleep.

If you have any questions about super single waterbed dimensions, call us at 1-800-428-7083.