Depth:
Measure the top of your gutter from front to back. This determines the gutter depth. It should be a 5" or 6" in depth. The standard Leaf Defier Gutter Filter insert fits all 5" and 6" K Style gutters. Half Round Styles are available in 5" and in 6" depths.

Linear Feet:
Measure the existing length of the gutters on your house to determine the linear feet. Leaf Defier Gutter Filter is available in 4' sections.