The Short Answer
UPS has strict hard limits.
Max Length: 108 inches.
Max Weight: 150 lbs.
Max Size (L + Girth): 165 inches.
Exceeding ANY of these triggers the "Over Maximum Limits" fee, which is punitive (starts around $1,250). Large packages under these limits but over 130" L+G incur a "Large Package Surcharge."
The Three Hard Limits
You must comply with ALL three of these rules. Failing just one disqualifies the package from the Small Package network.
Limit 1
150 lbs
Max Actual Weight
Limit 2
108"
Max Length (Longest Side)
Limit 3
165"
Length + Girth
How to Calculate Length + Girth
This metric (L+G) confuses most shippers. Here is the formula:
L + [(2 × W) + (2 × H)]
Example: A box is 48" x 20" x 20".
1. Identify Longest Side: 48" (Length).
2. Calculate Girth: (2 × 20) + (2 × 20) = 40 + 40 = 80".
3. Add L + G: 48 + 80 = 128".
Status:
• Under the 165" Hard Limit? YES (Safe).
• Under the 130" Large Package Limit? YES (No Surcharge).
• Safe to ship via UPS Ground.
The Fee Hierarchy
Understanding the tiers helps you avoid sudden price spikes.
| Tier | Threshold | Fee Estimate (2026) |
|---|---|---|
| Standard | < 105" L+G | Base Rate Only |
| Additional Handling | Longest Side > 48" OR Weight > 50 lbs | $35 - $45 |
| Large Package | L+G > 130" OR Side > 96" | $140 - $200 |
| OVER MAX | L+G > 165" OR Side > 108" | $1,250+ |
Why the $1,250 Penalty?
Why is the Over Maximum fee so incredibly high ($1,250+)?
UPS hubs utilize high-speed conveyor belts and automated sorters. A package longer than 108 inches or larger than 165 inches L+G cannot physically turn the corners on these belts.
When an over-max package enters the system, it often jams the belt, forcing a system shutdown. Employees must manually climb onto the belts to clear the blockage. This stops the processing of thousands of other packages. The $1,250 fee is not just a penalty; it is "damages" for disrupting the network flow. It is designed to be effectively prohibitive—UPS does not want this package.
The Alternative: UPS Freight / LTL
If your package exceeds 150 lbs or 165 inches L+G, it is no longer a "Parcel." It is "Freight."
You must build it on a pallet and ship it via UPS Freight (TForce Freight) or another LTL carrier. While the base rate for LTL might be higher than a ground parcel, it avoids the $1,250 penalty fee, making it significantly cheaper for oversize items.
Pro Tip: If you are shipping a 140 lb treadmill that is 160" L+G, you are in the "Danger Zone." One inch of bulge or one pound of scale discrepancy could trigger the Over Max fee. It is often safer and cheaper to just ship it LTL to avoid the risk.
Glossary
Girth
2x Width + 2x Height. The distance around the package.
Length + Girth (L+G)
The combined metric used for size limits. (L + 2W + 2H).
Large Package Surcharge
Fee applied when L+G > 130" but < 165".
Over Maximum Limit
punitive fee ($1000+) for exceeding 165" L+G or 150 lbs.
Frequently Asked Questions
Disclaimer: This content is for educational purposes only. UPS Service Guide fees and limits change annually. Always verify size limits with the official UPS Tariff.