Collection of 2(length)x3(height) blocks and 1x2 blocks windows. windows with details that's in 2x3 and 1x2 size.

If you are tired of dull 1x2 window with glass, or a slab block inside, try some of the window designs here to fancy it up! Also, you don't have to enlarge the size of your windows to add the details and enlarge your builds to match the size to the window. So now, you can build the detailed but smaller buildings that's in good proportion to Steve (2 blocks in height).

You could also refer the window designs to create your own custom windows.