How do I what the right size is know?
With each belt is shown in which the available sizes and the relationship to the known clothing sizes:
Size: 85 cm This is suitable for a radius of 80 to 90 cm
Size: 95 cm It is designed for a girth of 90 to 100 cm
Size: 105 cm, this is suitable for a periphery of 100 to 110 cm
Size: 115 cm, this is suitable for a circumference of from 110 to 120 cm
Size: 125 cm This is suitable for a radius of 120 to 130 cm
Size: 135 cm, this is suitable for a periphery of 130 to 140 cm 
To determine the exact size carefully, you can also measure the circumference of the body where you want to wear (eg your hip or waist) the belt. Then choose the belt in number centimeters most comes close:
You measure 86 inches, for example, choose only 85. Do you measure 92 cm, choose size 95. Whether you measure 107 cm, choose size 105 etc. etc.
Note to (wide) straps around your waist
Take care so well, that you are measuring on the spot where you want to wear the belt. If you choose for example a (wide) belt that you wear around your waist then you might need more than you are used to wearing another measurement.