Measure gutter across the top from the back where the gutter meets the home to the outer most edge. (See pics below) Most residential gutters will measure approx. 5 inches across the top with the opening being 4.5 inches.
If your gutter type and gutter measurement matches the image, click the corresponding button above for more info and place your order. Scroll down to see more gutter styles. Still don't see your gutter type? Then order sizing samples (3 sizes per box) to fit and see which size GutterBrush best fits your gutter.View Sample Pack Options
GutterBrush comes in 5 sizes, of which the actual bristle diameters are 3.25", 4.25", 5.25", 6.5" and 8". Choose the size that best fills the width of the gutter without overly compressing the bristles; a raised or "crowned" profile is desirable but not imperative.
Do you have Fascia Style Rain Gutters? (depicted below, common in Western U.S) CLICK HERE for more information about how our gutter guard works protecting Fascia gutters. Fascia Style gutters come in a few different configurations and we have found that most fascia gutters seem to be protected best when outfitted with Standard GutterBrush for 5" gutters, which has an actual diameter of 4.25 inches.
Metal building gutters come in many different sizes and profiles. GutterBrush comes in large sizes to fit metal building gutters. The best GutterBrush fit should fill the width of the steel building gutter without overly compressing the bristles. It may not be possible to have a crowned or raised bristle profile, because often with metal buildings, the front edge of the gutter is designed to be even higher than the roof drip edge; because the front edge of the gutter is strapped to the upper portion of the roof panel ribs.Click for Large Commercial & Industrial Gutter Guards