SIZE 8 = (14" x 6" Overall Dimensions) - MEASURING INSTRUCTIONS - Measure the overall dimensions of your existing vent/ register. The overall dimensions of a SIZE 8 will be 14"x6" CLASSIC DESIGN – Instantly improve the look of your existing ugly registers. NO TOOLS REQUIRED – the Magnetic Frame allows you to connect to your existing register in seconds (retrofit kit included for aluminum registers) PAINTABLE – Paint to match any room UNIVERSAL DESIGN includes cutout for existing louver handle HIGH QUALITY – Electrostatic Filter (Included) MERV 7 Rating Crown Vent Magnetic Register Cover & Filter - SIZE 8 Designed to fit over your existing HVAC register / grille, Replaceable Electrostatic Media Filter Included, NO TOOLS REQUIRED.