Seal it, send it & smile. Flyers, newsletters, brochures & more stay securely fastened in the mail with these mailing seals. Affix the seals to the edge of the pages, & the permanent adhesive keeps mailings from unfolding while in transit. Customize with free templates available from Avery Design & Print. Sealing is the smart way to ensure safe mailing, so you can smile without worry. Shape: Round; Label Size – text: 1" dia; Label Color(s): Clear; Color Family: Clear.