Shutterfly is a popular website where people create on-line accounts to upload, share and order prints from their digital cameras. Whenever someone orders prints from Shutterfly, a branded 4" x 6" mail insert will be included with their pictures. The branded mail insert ad will be placed in front of the pictures to guarantee that the ad is seen. Shutterfly sends approximately one to three-million mailings a month. Minimum quantity purchase may apply.