Well…yes, but…DON’T. We highly advise you leave that to a professional. Measuring for window coverings is a relatively simple process BUT, the type of product will dictate how those need to be taken. For instance, Roller Shades often (not always, and a professional will know) just need the top of the opening where the headrail will be mounted measured and the height of the opening. Horizontal slat blinds, however, require a top, middle and bottom measure where the narrowest width is recorded so the blind doesn’t get caught up when pulling it down. Then there are factors such as window depth, frame, sill, inside or outside mount that need to be considered. These things play a part in the mounting of the product, therefore the person measuring needs to be aware of these influences. A mistake on one window could cost FAR MORE to replace the product than it costs to hire a pro to measure in the first place, not to mention what it would cost if you make the same mistake on 20 windows!