Depends. This question is like:
How much does a person weigh?
A standard single mattress in the UK measures 3ft x 6ft 3" (90 x 190 cm)
Depending on which part of the country this mattress is from the size of a single mattress for a single bed can vary. For example, a single bed in Australia is 91cm x 190cm, however a single bed in North America is 99cm x 190cm.
Depends. They vary in weight.
as much as my wee wee
50 pound
Generally a King Mattress is 185 pounds can be 10% up or down.
Can weigh up to 700 pounds when it is wet.
Single and Twin are common names given to the same mattress. 38 x 74
Depends. They vary in weight.
Depends. They vary in weight.
Depends. They vary in weight.
Depends. They vary in weight.