Delta Blinds Supply Custom-Made, Premium Real Wood Horizontal Window Blinds, 2 Inch Slats, Alabaster (Cream/Ivory,) Inside Mount Actual blind width is 45.5 in. Fits inside a window frame that is 46 in. wide. The valance will be exactly 46 in. wide. MEASURING INSTRUCTIONS: Please see our second photo on this page. QUALITY: Warp-Proof in non-humid rooms; Lightweight Hardwood MATERIAL: 100% Premium kiln dried basswood from northern United States. CERTIFICATIONS: Greenguard Air Control and Greenguard Schools & Children FUNCTION: Heavy-duty components for smooth operation, higher load capacity, and enduring performance.