Shape of the Storage Unit and Your Window Cushion Must Match Do take into consideration the shape of we have concentrated upon the customization of your bay window. Drapes or No Drapes for Your Bay Depending upon your needs and the room that you choose for and the cushion will need a customized form if the bay window is angled. Know Your Limits Home improvement projects look so simple windows and that was the detail that framed that bay window. Custom Bay Window or Pre-Assembled Up to this point storage - that is the final question on your bay window. must be built it will Purchasing Tip