UPS has established specific weight and size limits for the packages that you send with all UPS services. The restrictions below only pertain to individual packages. There are no limits to the total weight of your shipment or the total number of packages in your shipment.
Packages can be up to 70kg
Packages can be up to 419 cm in length and girth combined
Packages can be up to 274 cm in length
Packages that weigh more than 31.5kg (25kg within the EU) require a special heavy-package label
Packages with a large size-to-weight ratio require special pricing and dimensional weight calculations
From: https://www.ups.com/gb/en/help-center/packaging-and-supplies/weight-size...