This is my second order. I'm in my seventies. Had a stroke three years ago. Right side not working so good anymore. Was intimidated until I installed my first order (Five 2" deep Faux Wood Inside Blinds) which was a perfect fit! Now looking forward to doing my bedroom with 1" Mini Beige Blinds. My Mobile home is lined in true wood veneer paneling. Blinds.com is pure genius! Why do they have a size guarantee? Because they probably never have to use it!