Yes, length is the problem. I'm only about 5'8" but my feet untuck the covers and go over the bottom of my 6'2" mattress. Assuming 10-15 cm (4-6") from the headboard to the top of my head, and about the same below if I stretch my legs and toes, I need the mattress to be at least 8" (~20 cm) longer than I am. A 6'2" mattress leaves 3" above and 3" below, which isn't enough, though sleeping diagonally gives a bit more length when my dog isn't parked in the way. Also, I have yet to find fitted sheets or mattress pads that aren't too long for the mattress. Not a fatal PITA in the overall scheme of things, but still a PITA.