How about jeans sizes
Jeans sizes are in inches. The first number concerns the waist size, in this case 32 which equates to 81.3 cm. The second number is the measure of length, size 36. In centimeters this is 91.4 cm. Size 36 is usually for the tall man with an above average height from 1.95 meters.
How do you measure yourself
You do this with a measuring tape. Measure the circumference of your hips, waist and thighs. Don't forget to measure the length of your inner legs. Have you measured everything? Consult the size chart for the correct size. The circumference of your thigh is especially important when buying skinny-fit jeans or slim-fit jeans.
What are widths
You can recognize the width size by the first number of the size combination. So with jeans that is 32/36. A width size is based on a waist size.