7/21/2019 - Measure your gutter across the top from the back where the gutter meets the home to the outer edge. (See photos below) Most residential gutters will measure approximately 5 Inches across the top with the actual opening being approximately 4.5 inches. standard 5" seamless K-style OG or OGEE gutter profilestandard 6" seamless K-style, OG or OGEE, gutter profilestandard 7" seamless K-style, OG or OGEE, gutter profile If your gutter style and measurements matches one of the images above, click that image to view more information and place your order. Page down to see additional gutter styles. If you still do not see your gutter style, order sizing samples (3 sizes per box) to determine which size GutterBrush best fits your gutter. FASCIA GUTTERS: Do you have Fascia Style Rain Gutters? (Depicted below, common in Western U.S.) CLICK HERE for information about how our gutter guard works with 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. Fascia Style Rain Gutter profileFascia gutter measurement and profileWhite Fascia rain gutter installed on buildin HALF ROUND GUTTERS: GutterBrush customers love GutterBrush protecting their 5" and 6" half round gutters! This historic ornamental gutter style (depicted below) has made a huge resurgence in recent years. Sizing samples are available to check the optimal fit, but in most cases the 5" half round gutter requires Standard GutterBrush for 5" Gutters while the 6" half round gutter requires Oversized GutterBrush for 6" gutters. Yes, much of the GutterBrush is visible above the gutter; GutterBrush customers say they love the function, and the fact that the brush is neatly visible is an excellent and interesting conversation piece for those strolling past the house. About The Author:- 5 inch Gutters - GutterBrush customers love GutterBrush protecting their 5" and 6" half round gutters! This historic ornamental gutter style (depicted below) has made a huge resurgence in recent years. Contact Details: GUTTERBRUSH LLC 855 Aquidneck Ave Ste 6 Middletown, RI 02842 Phone.No.- 1-8883979433