If you know something about european sizing, you might be aware that there used to be not only numbers, but letters too, for different body types. In practice these haven't been used for a long time.

Regarding width and height: It's easy to get confused, so calm down! If you are taller or thicker than usual, you need a bigger size. The sizes get bigger in both dimensions. This means that if you are 190 cm tall and slim, your waist would happily accept size 50 trousers, but the pants will be short. Or if you have a lot of belly but you are short, you might need a size 56 jacket, on which the sleeves will be long. Yes, it's a pity if you're funny proportioned. Sometimes it pays to be normal.

As you measure yourself, take the actual measurements, don't add some just to be sure. Correct places for measurements are shown in the picture.

Sizes 42 or 60 and above are very uncommon.