scale up the block... find an ohio star quilt that you like and then count blocks.... 5 x 6... or 6 x 7? borders added? then measure how much the 'queen size' sample covers from first to last block on the top row.... 72? and you need how much? 90? they have 6 blocks in 72".... so you need to divide 90 by 6...your blocks need to be 15"... weird size? 16 isn't.... and on a bed that big... it will be fine... it will look proportional to still have 6 blocks wide and 7 blocks long at 16" for a king size.... even a crib quilt would look good at 6 x 7.... they would just be 9" sq.... so 54 x 63.... proportion is everything and while they will look kind of big while working on them... it will look right on the bed..