I'm the odd-person out, I guess. I like 65x65". I used to make them smaller, but found that unless I put a hanging rod, parents really weren't using them much when the little one was first born. The larger size gives more room for tummy time & is large enough to serve as a nice lap quilt all the way through to college. But, then again, I make heirloom quality quilts that I expect to last for at least 20 years.