extra large;
as, a king-size bed. [
WordNet 1.5]
" A king-size bed is the largest size generally sold commercially; it is larger than a queen-size, which in turn is larger than a full-size (or double) bed, and that in turn is larger than a twin-size (or single) bed. The mattress for a king-size bed is typically about 76 inches wide and 80 inches long."
[PJC]