"Oversized" isn't a universal threshold — every carrier defines it differently, and the definitions changed for several major carriers in 2026. Here's the complete reference.
Why this matters
A package that's "standard" for USPS might be "oversized" for UPS. A FedEx Ground shipment that's clean might trigger a Large Package fee at UPS. Understanding each carrier's definition lets you route packages to whichever carrier treats them most favorably.
FedEx (effective January 12, 2026)
| Category | Trigger criteria | Fee (approx) |
|---|---|---|
| Additional Handling — Dimension | Longest side >48" OR cubic volume >10,368 in³ | ~$33 |
| Additional Handling — Weight | Actual weight >50 lb | ~$46 |
| Oversize Charge | Length >96" OR L+G >130" OR volume >17,280 in³ OR weight >110 lb | ~$155+ |
| Over Maximum Limits | Length >108" OR L+G >165" OR weight >150 lb | ~$1,200+ |
Oversize-classified packages also have a 90 lb minimum billable weight.
UPS (effective January 26, 2026)
| Category | Trigger criteria | Fee (approx) |
|---|---|---|
| Additional Handling — Dimensions | Longest side >48" OR second-longest >30" OR cubic volume >10,368 in³ | ~$33-$46 |
| Additional Handling — Weight | Actual weight >50 lb | ~$46 |
| Large Package Surcharge | Length >96" OR L+G >130" OR volume >17,280 in³ OR weight >110 lb | ~$219-$286 |
| Over Maximum Limits | Length >108" OR L+G >165" OR weight >150 lb | ~$1,875 |
Large Package-classified shipments also have a 90 lb minimum billable weight.
USPS
| Category | Trigger criteria | Fee/treatment |
|---|---|---|
| Dimensional weight applies | Volume >1,728 in³ (1 ft³), Priority/Ground Advantage | DIM weight billing |
| Balloon pricing | L+G 84"-108" AND weight <20 lb (Ground Advantage LOR) | Bills as 20 lb |
| Oversize | L+G >108" (limited services) | Oversize rate |
| Nonmailable | L+G >130" OR weight >70 lb | Cannot ship via USPS |
| Dimensional noncompliance (expanding 7/2026) | No dimensions on label, any size | $1.50 per package |
DHL Express
| Category | Trigger criteria | Fee (approx) |
|---|---|---|
| Non-stackable | Cannot be stacked due to shape | Varies by region |
| Overweight Piece | Actual weight >70 kg (154 lb) | ~$165 (region-dependent) |
| Oversized Piece | Longest side >120 cm OR L+G >330 cm | ~$165 (region-dependent) |
| Maximum size | Longest side >300 cm OR L+G >419 cm | Requires freight |
| Maximum weight | >1,000 kg (2,200 lb) | Requires freight |
Canada Post
| Category | Trigger criteria |
|---|---|
| Oversize handling fee | Length >100 cm OR L+G >200 cm (~$15 CAD) |
| Maximum dimensions | Length >200 cm OR L+G >300 cm |
| Maximum weight | >30 kg (66 lb) |
Royal Mail (UK)
| Category | Trigger criteria |
|---|---|
| Large Letter | L >240mm OR W >165mm OR thickness >5mm |
| Small Parcel | L >450mm OR W >350mm OR depth >160mm (counts as Medium) |
| Medium Parcel | L+G >900mm (extra charge applies) |
| Maximum dimensions | L >1.5m OR L+G >3m |
| Maximum weight | >20 kg domestic / >2 kg international tracked |
Australia Post
| Category | Trigger criteria |
|---|---|
| Standard parcel | Up to 22 kg, 105 cm any side |
| Oversize/extra handling | Longest side >105 cm OR weight >22 kg |
| Maximum dimensions | L+G >360 cm |
| Maximum weight | >32 kg (some services) |
Blue Dart (India)
| Category | Trigger criteria |
|---|---|
| Standard parcel | Up to 30 kg, longest side <120 cm |
| Oversize / non-conveyable | Longest side >120 cm OR L+G >270 cm |
| Maximum dimensions | Varies by service tier; air services have different limits than ground |
The universal patterns
Across all major carriers, certain thresholds tend to be near-universal:
- ~108 inches / 274 cm longest side is a common upper limit
- ~165 inches / 419 cm length + girth is a common parcel maximum
- ~70 lb / 30 kg is a common postal service weight limit
- ~150 lb / 70 kg is a common courier weight limit
- 1 cubic foot is a common threshold for triggering DIM weight on postal services
How to choose the carrier for borderline packages
For a package that's borderline oversize, pick the carrier with the most favorable definition for your specific dimensions:
Small but heavy (under 1 ft³, over 70 lb)
USPS won't carry it (70 lb max). UPS or FedEx are your options. Cubic Pricing on FedEx Ground (if you qualify) can be cheaper than standard rates.
Large but light (over 1 ft³, under 20 lb)
USPS Priority or Ground Advantage applies DIM weight but caps total cost at 70 lb billable. UPS or FedEx apply DIM weight without cap. USPS is often cheapest unless DIM weight pushes it over the 70 lb USPS max.
Large and heavy (over 17,280 in³ or over 110 lb)
You're paying surcharges no matter what. Compare: UPS Large Package ~$273 + 90 lb min vs FedEx Oversize ~$155 + 90 lb min. FedEx often wins on the surcharge itself; UPS may win on base rates if you have negotiated discounts. Run actual quotes.
Genuinely oversized (over 108" longest, over 165" L+G, or over 150 lb)
Parcel isn't the right tool. Use freight (LTL — Less Than Truckload). FedEx Freight, UPS Freight, Old Dominion, XPO, etc. Freight rates for genuinely large shipments are typically 50-80% cheaper than parcel "Over Maximum Limits" fees.
The audit you should run today
For shippers with even moderate volume of bulky packages, these 2026 rule changes create real exposure. Run this audit:
- Pull your last 90 days of shipments from each carrier
- For each, calculate cubic volume (L × W × H)
- Flag any that newly cross 2026 thresholds (10,368 in³, 17,280 in³, 110 lb)
- Multiply by average surcharge amounts
- Compare to cost of packaging optimization (custom boxes, smaller dimensions, flat-packing)
For shippers above 1,000 packages/month with even 5% touching new thresholds, the annual exposure typically exceeds $20,000.
Bottom line
Every carrier defines "oversized" differently. Major carriers use cubic volume (17,280 in³), length (96-108"), length+girth (130-165"), and weight (70-150 lb) thresholds — but the specific numbers and the fees differ. The 2026 changes from FedEx and UPS added cubic volume triggers that catch packages previously exempt. Use the calculator above to check your packages against every carrier's thresholds and route to whichever carrier treats your specific package most favorably.
Run the calculation
Use the dimensional weight calculator to see exactly what your package would bill at across every major carrier.
Open calculator →