This has been a puzzle to me for a while, but only became relevant to something I was working on, last week.
*Why* does the backing of a quilt have to be larger than the top?
I ask because, I had to go to some trouble to enlarge backings I found which were just about right - but had to be larger. (I was wanting to do all last week's work from stash - which, in the end, I did!).
I know the standard answer is 'because the quilting will take up some of the width and length'. But, if the quilt is being quilted through all three layers - which it is, why does the quilting take up more fabric from the back than from the top? I truly can't understand - though I have always done what I understood was the correct way of doing it >g<
I don't suppose I will often meet this problem, as I so often work small, but I honestly would like to know the real answer. I have some larger quilts in my short-term plans and, although I have fabric bought for their tops, I haven't yet sorted the backs.