#10 Kwik-Tak Seal Envelopes with return address, black imprint

4.125" x 9.5" 

Side Seam Pressure-Sensitive Envelopes, No. 10 (4-1/8" x 9-1/2") White Vellum (SFI Certified), Kwik-Tak Seal, No Window

designed for multiple openings before losing its tack.