6" (SIX INCH) BRICK

What you see in this picture is 6 inch Brick. 

We heard of 9 inch Brick Wall (2 Brick Courses arranged in English bond/Flemish bond) and 4.5 inch Brick wall (One Brick Wall)


By using  6 inch Brick for outer wall ( instead of 9 inch Brick) one can save lot on Internal Room Space and it does the same purpose as 9 inch Brick Wall.