Andersen double hung window (sash only) lower sash 32"wide 24" high, high performance. New in box. Andersen size "33310" if you've ever broken an Andersen window, you know how long it takes to get a replacement, and how expensive they are. Buy a spare! If this is your window size, buy it now, so when you need it, you'll have it. I also have an Anderson casement (Andersen size "c4") sash size 46 1/2" tall, 23" wide. New in box see my other ad. Do not ask if still available. If sold, I will remove ad, and i won't answer you.