is it safer to have a 9 inch high step riser or a 5 inch high step riser?

A 5-inch high step riser is generally safer than a 9-inch high step riser, as lower steps are easier to navigate and reduce the risk of tripping or falling. Higher steps can pose a greater challenge, especially for individuals with mobility issues or those unaccustomed to climbing stairs. Additionally, building codes often recommend a maximum riser height of 7-8 inches for safety reasons. Therefore, a 5-inch riser is typically more user-friendly and safer.