: Small, Medium, and Large sizes that ship for one price regardless of weight (up to 70 lbs).
: Many branches sell a line called "ReadyPost," which includes sturdy cardboard boxes, bubble mailers, and tape. can i buy shipping boxes at the post office
: These boxes can be used for any mail class, but they are not free like the Priority Mail versions. 3. Alternative Purchase Locations : Small, Medium, and Large sizes that ship