Which clearance value is required on each side for standard side mount drawer guides?

• A. 1/4"
• B. 3/8"
• C. 1/2"
• D. 5/8"

Answer: (C)

When using standard side-mount drawer guides, you want enough space so the drawer can slide freely without rubbing the cabinet walls or the guide hardware. That means providing a clearance on both sides of the drawer equal to about 1/2 inch. This amount accommodates slight misalignment, wood movement, and manufacturing tolerances, while keeping the drawer centered and the front flush with the cabinet face. If the clearance is smaller, binding can occur as the drawer opens and closes; if it’s larger, the drawer can feel loose and the guides can feel unstable. So, 1/2 inch on each side is a practical, standard setting for reliable sliding performance.