9 Different sized windows (yes there is ten, one window is copied and flip to finish out the tall arch). These are in imperial measurements (feet and inches). Each window is a component made up of groups, There are uppers and lowers which are groups inside the frame. These are composed of groups which are the glass and the mullions and the inner frame. You can remove all or one of the mullion in a window (if you want). These are currently painted silver. however you can repaint them anyway you like.