24" X 24" Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 25" Width X 25" Height HVAC Premium has been providing superior in quality service for many many years. Our access panels provide immediate access to any of your plumbing, electrical, or construction needs while providing a clean and smooth looking aesthetic and design to your home and can be painted to match your space. We have many different types of access panels including fire rated, sound proof, aluminum, galvanized steel, gypsum/drywall, and plastic models with various locking mechanisms like tumbler locks, slotted locks, allen key locks, and push-locks. Our products are second to none, and we've helped numerous contractors, DIY projects, and home improvement remodeling specialists complete their masterpiece. If you are looking for a top of the line unit to enhance your project look no further than HVAC Premium! Wide Front End Overlap - 1" Inches. Aesthetic - Improve the look of your home with an access panel that hides your cables, wires, pipes, and ducting while providing easy entry to critical points in your wall or ceiling. Security - This access panel comes with a lock and 2 keys included - All Locks Open With 1 Key Rigid Steel Built - Strong and sturdy steel built to last. How To Measure An Access Panel Overall Size: Measure the size of the air duct/drywall opening. Every access panel has a front end frame, that will overlap at wall joint. Width vs Height The first number in a grille size, represents the width, the second number represents the height. Example: If your hole is 14" wide by 14" tall, order a 14x14.