Lower maximum size standards may apply to mail addressed to some apos fpos and dpos.
Usps first class package box size.
This can be determined through the postage calculator.
Learn more about usps oversized package charges.
Weight size shape requirements maximum weight for first class mail letters is 3 5 oz.
All postcards and envelopes or flats must be rectangular otherwise an additional charge may apply.
Maximum sizes and weights for usps services domestic services.
Weight size shape requirements.
22 x 18 x 15 maximum weight.
How to prepare a package.
Machinable packages may not be smaller than 6 x 3 x 0 25.
Look up a zip code hold mail.
From 0 55 at a post office.
Parcels that exceed 13 ounces are mailed at the priority mail rate.
70 lbs 1120 ounces priority mail cubic.
13 ounces price based on weight and zone.
Usps retail ground items that are between 108 and 130 inches will be charged at the oversized price.
Packages are also subject to minimum dimensions.
Packages can be sent using priority mail express priority mail first class package service retail usps retail ground and media mail.
Maximum weight is 70 lbs.
Usps has a variety of mail services different delivery speeds package sizes and extras like tracking and insurance.
18 in any dimension total volume cannot exceed 0 5.
First class package service retail parcels cannot measure more than 108 inches in length and girth combined.
For large first class mail envelopes and parcels the maximum weight is 13 oz.
No package may be smaller than 5 x 3 5 x 0 007.
Maximum combined length and girth girth is the distance around the thickest part is 108.
When sealing a flat rate envelope or box the container flaps must be able to close within the normal folds.
First class mail is an affordable mail service for standard sized single piece envelopes weighing up to 3 5 oz and large envelopes and small packages weighing up to 13 oz with delivery in 3 business days or less.
The maximum size of a parcel bound for an international destination varies based on country.
15 99 oz weight based priority mail.