Package size limits by carrier

Length plus girth is the longest side plus twice the width plus twice the height. USPS takes parcels up to 70 lb and 108 inches in length plus girth (130 inches for Ground Advantage), and UPS and FedEx Ground take up to 150 lb, 108 inches long and 165 inches in length plus girth.

Lengthin Widthin Heightin Weightlb

112in

Length plus girth: 36 + 2 × (20 + 18)

Over the limits for USPS Priority Mail and most services. USPS Ground Advantage: charged the oversized price from 108 to 130 in.

Where the box lands with each service

Each tape runs from 0 to 180 inches of length plus girth. The marker is your box.

USPS Priority Mail and most services70 lb, 108 in length + girth

Too bigover 108 in length + girth
USPS Ground Advantage70 lb, 130 in length + girth

Oversized priceover 108 in length + girth
UPS Ground and air150 lb, 108 in long, 165 in length + girth

Fits18 in under the Large Package line
FedEx Ground and Home Delivery150 lb, 108 in long, 165 in length + girth

Fits53 in to spare
FedEx Ground Economy70 lb, 130 in length + girth

Fits18 in to spare
FedEx Express150 lb, 119 in long, 165 in length + girth

Fits53 in to spare

Standard priceShips at a higher priceOver the maximum

How to measure length and girth

Measure all three sides at their widest points, including any bulge in the box.
Take the longest side as the length.
Add the other two sides together and double them. That is the girth: the distance around the box.
Add the length and the girth together, and compare the weight and the longest side with each carrier’s limits as well.

36 + 2 × (20 + 18) = 112 in

Staying under the limits is only half the cost. Big, light boxes are usually billed on their size before they reach a limit, so check the dimensional weight calculator as well.

Size and weight limits by carrier

Domestic U.S. maximums per package, checked 2026-10-28
Carrier and service	Weight	Length	Length + girth	Higher price before the maximum
USPS Priority Mail and most services	70 lb	Within length + girth	108 in	None in these limits
USPS Ground Advantage	70 lb	Within length + girth	130 in	Oversized price from 108 to 130 in
UPS Ground and air	150 lb	108 in	165 in	Large Package over 130 in length + girth or 96 in long, billed at 90 lb or more
FedEx Ground and Home Delivery	150 lb	108 in	165 in	None in these limits
FedEx Ground Economy	70 lb	Within length + girth	130 in	None in these limits
FedEx Express	150 lb	119 in	165 in	None in these limits

Carriers also add handling charges for long, heavy or awkward packages that are still under these maximums. Check each carrier’s current rate guide before you choose a box.

When the box is too big

Over USPS’s limits, a parcel can’t be mailed; over UPS’s, it draws an over-maximum charge. Rather than fight the limits, ship heavy and bulky goods as LTL freight. The pallet calculator shows how many cartons fit on a pallet and how tall the load gets.

Bringing large cartons in from overseas? Size the shipment with the CBM calculator, then see how they load with the container loading calculator.

Common questions

How do I calculate length plus girth?

Measure the longest side: that is the length. Add the other two sides together and double the result: that is the girth. Length plus girth is the two added together. A 36 × 20 × 18 inch box is 36 + 2 × (20 + 18) = 112 inches.

What is the largest box USPS will ship?

USPS takes domestic parcels up to 70 lb and 108 inches in length plus girth. USPS Ground Advantage takes parcels up to 130 inches, and charges its oversized price for those between 108 and 130 inches.

What are the UPS size limits?

UPS takes packages up to 150 lb, 108 inches long and 165 inches in length plus girth. A package over 130 inches in length plus girth, or longer than 96 inches, is a Large Package and is billed at a minimum of 90 lb.

What are the FedEx size limits?

FedEx Ground and FedEx Home Delivery take packages up to 150 lb, 108 inches long and 165 inches in length plus girth. FedEx Express allows up to 119 inches of length. FedEx Ground Economy is limited to 70 lb and 130 inches in length plus girth.

What if my package is over the limits?

A package over a carrier’s maximum either can’t ship with that service or draws an over-limit charge, depending on the carrier. Heavy or bulky goods often ship more cheaply as LTL freight on a pallet.

Sources

Checked 2026-10-28. Rules change; confirm with the carrier or agency before you rely on a number.

See every tool

Hand off the packing and the carrier rules.

Tell us your products, box sizes and order volume, and we’ll come back with an itemized fulfillment quote.

Get a fulfillment quote Check dimensional weight