Westvaco Glassine Envelope Size #1 (ct. 200), #2 (ct. 200), #3 (ct. 500), #4 (ct. 50) #5 (ct. 50). Total of 1,000 Envelopes Brand: Westvaco Size: #1 Thru #5. All measurement are in inches Color: Translucent (clear) Opening: Top Non-gummed V-Shape flap Material: Virgin #30 Acid- free and PH neutral suitable for archival quality