Measure your old belt from the tip of the buckle (including the buckle) to the belt hole you normally use, in centimetres. This will give you the correct measurement for the position at which you normally wear your belt.
Order the size you now need to the nearest 5cm, e.g. 85cm, 90cm etc.
Our belts are measured in centimetres from the tip of the buckle to around the middle hole, so that your new belt should fit perfectly!