Here's the window (approx. 29 x 31 in) we're installing in the stairwell, where the sitting room looks over the staircase. We needed to install something in the overlook for safety -- JJ likes to climb. The window cost $65 -- yep, more than twice the cost of a $30 generic barn sash. But it's a real antique. And it's historically accurate for the house. And, best of all, I found it right here in the neighborhood, so it cost nothing to transport it, and the purchase was convenient.