Water bed King Size Bed Dimensions are 72 inches wide x 84 inches long. These are standard Water bed King bed measurements.Many times, actual king water bed mattress dimensions will vary by up to three inches, usually smaller. Water bed King Mattress depths can vary. In general, a wood sided water bed mattress is 8 to 9 inches tall.

Wood sided water beds were very popular in the last 30 years with the baby boomers. Since then, many boomers have aged and prefer innerspring conventional mattresses. Some of these boomers have substantial investments in their water bed wood frame and matching furniture. They can delete their water mattress and replace it with a King Size water bed innerspring replacement mattress. The mattress size measurement dimensions of a King Size water bed innerspring replacement mattress is approximately 70 inches wide by 82 inches long. The mattress is a few inches smaller than the wood water bed frame to allow easier bedding installation. The same bedding can be used for both a water filled water mattress and a replacement innerspring mattress. The depth or height of this King Size waterbed innerspring replacement mattress is approximately 8 to 10 inches.