No Tools-No Drill 1" Aluminum Mini Blinds, Cordless Blinds for Windows, Light Filtering Horizontal Blinds and Shades for Window, White

About this item A standard 2/5 inch deduction is made to the width for a proper fit. The actual blind size will be 19 3/5" W x 36" H, perfect for window 20'' W x 36'' H. The unique spring rod can extend 1 inch in total, allow the blind to fit for window size W19.7-20.6 X H36". ..