I just got this mattress delivered 2 days ago. The mattress size was a king. As soon as it was delivered it seemed the mattress was somehow small. The fitted sheet wasn'thaving a tight snug fit on the mattress and the bed frame had some space on the corners. I called the store and they said this is how its supposed to be. I measured the mattress it was 74 x 78. I called Serta today and they told me the mattress should be 76 x 79.5. For anyone who has this mattress can they post there dimensions of the mattress. Thank you

I dont have that mattress and we dont carry it here in the store, but industry standard would be 76 x 79.5 Plus or minus 1" yours being 74 x 78 is kind of odd and is typically out of normal range. I would double check the dimensions and then contact the retialer again. Let them know what Serta said the normal was and see if they can exchange it for you.

Errors happen in manufacturing and this could be an error, but like I said measure it again and have a freind measure it to see if they get the same numbers as you did. You just want to be very sure.