Dressing your windows with store-bought, ready-made draperies can be a guessing game. In the opinion of many designers, you’re better off leaving them bare or making due with a shade for privacy until you can afford the “real deal” — custom draperies, which will fit your window the way they’re supposed to, hang correctly and look like no store-bought version ever could. But before you open up your checkbook, it pays to know what your options are, so we’ve put together a little primer on custom draperies to help you decide on the best style for your tastes, your window type, and your budget.