How do I determine what size gutter I have?

To determine gutter size you must measure across the top from the back where the gutter meets the home to the outer most edge.

Measure the gutter across the top from the back where the gutter meets the home to the outer most edge. If your home has K-Style gutters and the measurement is 5 inches, you have a 5-K gutter. If your home has Half Round gutters, you have a 5 inch Half Round gutter.