I prefer a square quilt for a baby. It's a lot less bulk for cuddling and fits nicely in a travel bag. The 45 X 60" is called crib size but, let's face it, who makes a baby's bed?! Maybe at Grandma's house but not at home where the crib is used several times a day. A small rectangle works nicely for stroller or car seat use, too. But my usual choice is a square, utilizing the wof of the back as my destination measurement for the top.