‘Length+girth’ is a measurement that provides couriers with an insight into the general size of any given parcel.
The ‘length’ of a parcel is the measurement of its longest side.
The ‘girth’ of a parcel can be found by adding together the lengths of the two remaining dimensions of the parcel - the width and the height - and doubling the total.
Therefore, length+girth can be calculated as follows:
2(Width + Height) + Length