VERY IMPORTANT! PLEASE READ OUR DETAILED MEASURING GUIDE BEFORE PLACING YOUR ORDER. This slide-out shelf is custom-made to fit the measurements of your cabinet’s clear opening width and unobstructed interior depth. You will round down and select your closest cabinet opening width and depth measurements from the drop-down menus above. Note: We will manufacture your slide-outs based on the cabinet measurements you select from the drop down menu. Once installed, your slide-out shelf will have an approximate ¼ - inch clearance on each side for a perfect fit. To begin, first reference the cabinet MEASURING GUIDE in the 'Specifications' section below. All Slide-A-Shelf cabinet organizers are custom-made to fit your clear cabinet opening width and unobstructed internal depth measurements. Don’t assume measurements. Watch our How To Measure video and use our MEASURING GUIDE; cabinets can be constructed in a variety of ways and utilize different hinges/hardware that can impact your measurements.