here you go I cut them thin and longer that I need once I tie them to the pup I cut the excess, fleece streches so if she licks the fleece will stretch. i always make sure that I can fit my finger between the fleece marker and the pup, that is the right spacing. and I do change them as soon as I can't fit my finger comfortably in between.
here' a picture of my last litter wearing them.
http://i126.photobucket.com/albums/p...3/IMG_0322.jpg