Hand Luggage,

how strict is it for the size of hand luggage,

klm specs give 55L X 25W X 35H cm, total of 115 cm.

i have hand luggage size of, 58.5L X 30.5W X 25.5H cm, total of 114.5 cm,

does L X W X H have to be to their specification or any combination of L X W X H , as long as the total does not exceed 115 cm,

it may be a silly question, but i really do not know, but im assuming overall total is what matters?

or do i need to buy a new cabin hand luggage bag?