Polyester No Drill Blinds: LazBlinds patented technology No Tools-No Drill system allow it no need to drill any holes on your window frame, great for Renter, Landlord, and Home Buyer. Easy to Install in 30 seconds. Fit All Kinds of Walls, like woodiness metope, tile marble, concrete wall and rough tile. Inside Mount ONLY. For better internal installation, a standard 2/5 inch deduction is made to the shade width. The actual blind size is 31 3/5" W x 48" H, the unique spring rod can extend 1 inch in total, allow the blind to fit for window width 31.7-32.6 inch, blind height can adjust from 0" to 48"