We offer 5 and 6 inch gutters for residential projects. We recommend 6' gutters and 3x4' downspouts for all properties that have metal or tile roofs. These types of roofs often have a much larger downpour of water from snow or rain and need a larger gutter and downspout to handle the flow. This will ensure the water does not overshoot the top of the gutter and damage your foundation. 5' gutters and 2x3' downspouts are recommended for smaller ranch style homes.