1. Measure the three parcel dimensions in centimeters:
Example: 60 cm (Length) x 40 cm (Width) x 35 cm (Height).
2. Add the measurements of the two smallest dimensions together. Multiply the result by two. This is the girth of your package.
Example: 40 cm (Width) + 35 cm (Height) = 75 cm. 75 cm x 2 = 150 cm (Girth).
3. Now simply take the longest dimension and add this to the package girth. The result is the combined length and girth of your parcel.
Example: 60 cm (Length) + 150 cm (Girth) = 210 cm (Combined Length and Girth)