If a thing has size x it has smallness 1/x (so the bigger the thing, the less smallness it has). When you say one thing is 5x smaller than another, it means the

If a thing has size x it has smallness 1/x (so the bigger the thing, the less smallness it has). When you say one thing is 5x smaller than another, it means the smallness of the first is 5 times the smallness of the second. :P