These JAM Paper 4" x 9.5" Foil Self Adhesive Business Envelopes, 25ct. can cater to a variety of mailing occasions. With these foil water-resistant envelopes, your contents stay colorful and safe. Ideal for mailing flyers, invoices, invitations, and more! Can also be used as a unique pencil case at the office or school.Details: Available in multiple colors 4.125in. x 9.5in. #10 commercial size Foil, shiny finish Self adhesive closure 25 pack