


When sealing a Priority Mail Express Flat Rate Envelope, the container flaps must be able to close within the normal folds. Parcels that exceed 2 cubic feet (3456 cubic inches), add $25.00. Weight, Size, & Shape Requirements Use USPS Priority Mail Express Flat Rate Envelopes and pay one price: Pay the same price for mailpieces weighing up to 70 lbs going anywhere in the U.S.Pack your flat rate box without changing its dimensions or shape. Flat rate boxes cannot be purchased online. Parcels that exceed 30 inches in length, add $15.00. Purchase a box from any post office across Canada.Parcels that exceed 22 inches but not greater than 30 inches in length, add $4.00.Parcels that exceed one cubic foot (1,728 cubic inches) are charged based on the actual weight or the dimensional weight, whichever is greater (as calculated in DMM 113.1.3).For Sunday/Holiday delivery, add $12.50.USPS Marketing Mail Eligibility Decision Tree.For more information, please visit the Shipping Page. This product ships in single envelopes (1-5) or in a pack of 10. And its Priority Mail Express Tyvek envelopes were reduced in length from 15 and one-eighth inches to 15 inches. Designing Letter and Reply Mail (PUB 25) This Priority Mail Flat Rate Envelope - EP14F envelope features a predetermined flat rate regardless of the weight or destination zone of the package. For examples, the agencys large Priority Mail flat rate box was shrunk to 12 inches from 12 and one-fourth inches.
