Back off Boys - It's a Girls only party, and we only wanna do one thing.. Have fun!! Throw the ultimate slumber party for your little princess and her best gal pals with this fun invite! Minimum order of 20 pieces, 5 inches x 7 inches printed on 120 lb white eggshell felt, comes with a plain white, square flap envelope. Envelope liners & Colored Envelopes with contour flap are available at an additional cost. Different back and liner variants available via email.