HVAC Premium has been providing superior in quality service for many many years. Our products are second to none, and we’ve help numerous contractors, DIY projects, and home improvement & remodeling specialist complete their masterpiece. If you are looking for a top of the line unit to enhance your project look no further than HVAC Premium HVAC Premium has sold over 5,000,000 Grilles - We are proud of our many happy customers! 14"w X 14"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 15.75" Width X 15.75" Height - SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE Never Rust - Our high quality rigid aluminum is the longest lasting grille on the market. It will never rust and can be easily cleaned. The rigid Aluminum will keep its shape as in brand new condition. Rigid Design - Noise Free Components - No Vibrating Louvers Etc. Easy Unrestricted Air Flow For Your HVAC System How To Measure A Grille Overall Size: Measure the size of the air duct/drywall opening. *Do not measure the overall size of the register itself, only measure the "hole" in the wall/duct. Every grille has a front-end frame, that will overlap at wall joint. Total outer size of this grille is; listed size +1.5". NOTE: Louvers are 2” in depth - Size of Mesh Holes 1/2” Width vs Height The first number in a grille size, represents the width, the second number represents the height. Example: If your hole is 20" wide by 14" tall, order a 20x14. If your hole is 14" wide by 20" tall, order a 14x20.