Pre-Ordering allows you to place your order before your baby arrives so you can go ahead and address and stamp all the envelopes. If you don't know the sex of your baby go ahead and choose one for a boy and one for a girl (Same Size). You will only be charged for the one you choose. Simply call our toll free number after your bundle of joy arrives and your order will ship in 2 business days! There is a $5 shipping charge for Pre-Ordering.