Jewel Pink Self Sealing Cellophane Envelopes 4.75 x 6.50 inches. 10 or 100 cellophane envelopes sold per package. Self-sealing (self-adhesive) makes your catalog mailings so quick, easy and professional. Think of these bags as decorative envelopes with a self-adhesive strip to seal them. Bag background is clear. Yes you really can MAIL in these!