The easiest and quickest way to measure your parcel is to use a ruler or measuring tape, and a scale like the ones typically found at home, e.g. kitchen or bathroom scales.
As you know, it's important that the dimensions and weight are as close as possible to the actual measurements, which is why you must weigh and measure when the goods are already packed and ready for collection. If you are unsure about the exact weight, you can round it up to the next kilogramme as a rule of thumb to avoid any unnecessary charges.
Below we show you a reference image so you have no doubts between the length, width, and height of your parcel: