: Retailers like Staples and Office Depot offer the widest local variety, including security-tinted, catalog, and clasp envelopes.
: 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
Buying online is typically the most cost-effective method for quantities over 50–100 or for finding specific colors and finishes: : Retailers like Staples and Office Depot offer
For immediate, small-scale needs, several local retailers carry standard envelope sizes (such as #10 business or A2/A7 invitation sizes): where to buy envelopes