POPUP Mattress Size Mono Softside
If you are ordering a replacement waterbed mattress for an existing softside waterbed zip or pull the top cover on and measure the overall width and length.
Do not concern yourself with calculating the internal dimensions of the foam cavity.
The mattress size would be the same as the fitted sheet size that you would buy, (example 5' x 6'6")
The depth is nearly always the same but worth a quick check of approximately 21cm (8 ½”)
Other sizes not listed are available by request. Contact us