There are 2 ways to determine belt size:

1.  If you will wear a trophy belt buckle with our belt, go one size up from pant size.  (Exmple: If you wear a size 32 in jeans you will need a size 34 belt.) 

If you will wear a 3-piece buckle with our belt, go up two pant sizes. (Example: If you wear a 34in jeans, you will need a size 38 belt.)

2.  Measure a belt that currently fits you.  You will measure from the fold to the hole you wear that belt in now. That will be the size you need.