Buying online is typically the most cost-effective method for quantities over 50–100 or for finding specific colors and finishes:
: The USPS Postal Store sells standard white and manila envelopes. They also provide free envelopes specifically for Priority Mail and Priority Mail Express. where to buy envelopes
: Retailers like Staples and Office Depot offer the widest local variety, including security-tinted, catalog, and clasp envelopes. Buying online is typically the most cost-effective method