Yes, you can, but it’s not recommended. Most stores will not be held liable if your custom window coverings do not fit due to your imprecise measurements. Because the products are custom-made to your home’s specifications, they cannot be returned. However, if you feel that you would rather measure yourself, be sure and use a sturdy, metal tape measure. Cloth tapes can stretch, and yard sticks are not long enough. Also, be sure to measure your windows at least twice and confirm your measurements with your spouse or a friend. Many independent retailers who offer shop-at-home services will measure your windows and give you an estimate for free. Still others will charge a fee, but will apply it to a subsequent purchase. Check with the individual store policy for measuring before doing it yourself.