24" x 24" Drop Ceiling HVAC Return Grille - For T-Bar Lay-In - PERFORATED - INSULATED flat stamped steel + Product Details Size -

+ Product Details Size - 16"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

[Outer Dimensions: 22

so you are not left with much waste

actual front end outer dimensions are approximately 38 5/8" width X 20 5/8" height -

24" x 24" Drop Ceiling HVAC Return Grille - For T-Bar Lay-In - PERFORATED - INSULATED flat stamped steel + Product Details Size -Powder Coat Finish Smooth, Shiny, Scratch Resistant, Beautiful. Looks Like It Was Just Waxed Quality Packaging Carefully Shrink Wrapped with Cardboard Backing to Prevent Damage in Shipment Smooth Surface Edges Run Your Fingers Across The Surface To Feel The Smoothness Easy Unrestricted Air Flow For Your HVAC System Pack of 4 Pieces Perforated steel grille for return air flow, sized to fit into all drop ceiling system, also referred to as T Bar or Lay