The vellum is pre cut to 3 3/4 x 9 to perfectly fit the invitation ensemble. Although this limits you to printing the vellum overlay 1 at a time we thought it would be better than having our customers try to cut the vellums to size after printing. By nature vellum is not an easy paper to cut therefore printing and assembling your invitations without the extra aggravation of cutting will give a more professional look.