This pack includes 50 First-Class Mail Envelopes business letter size (#10), pack of 50 envelopes:
Each envelope holds up to 10 pages of paper, is bright white in color and has a full-face window designed to be used with Certified Mail Labels
website First-Class label. Our envelopes are made in the USA!
Not available in any store or Post Office
SHIPS USPS Priority Mail 2-3 day delivery