This custom bay window extension fits the width of the window on the Storefront Room Boxes (and can also be used to add more display areas to the sides of any of the deep room boxes).
Shown on the front of a Deep Storefront Room Box (and in another photo on the side of the same Deep Storefront Room Box) but the Room Boxes are sold separately.
10" tall (the height allows signage above the window, as the facades on the room boxes are 12" tall).
Note the open rectangular area on the back of the bay window's "back wall": that's to let you view into the store (through the window already cut in the Storefront Room Box, or through a window you can cut yourself in the front, back or side of any of the room boxes). Or you can omit this feature and just glue the bay window onto a solid wall.
It has a solid bottom and an extra tabbed piece that glues inside to make a bottom for the window. It also has a solid top plus a roof that extends about 1/2" beyond the window structure (flush on the back and extends past the front and sides).
Cut from medium-weight chipboard. Assembly is required, but it's super easy as the windows and tabs are pre-cut (and the folds are scored).10 inch Bay Window 151127LTS windows chipboard dollhouse DS by Gina