The xiphoid process is the smallest and most inferior region of the sternum, or breastbone. At birth, it is a thin, roughly triangular region of cartilage that slowly ossifies into a bone and fuses with the body of the sternum.
City Blocks differ in size, but the typical square city block reaches 16 or 17 per mile, or 2.21 to 2.50 Acres. Engineers use a typical city block as 100,000 sq. ft. for calculation estimates, which is about 17 blocks per mile or 2 1/4 acres. (A football field is 300 feet by 160 feet, which is 1.1 Acres.)
A standard building block is 17 inches by 8 and a half inches. Allowing for bed two blocks laid one after the other is one yard and two blocks on top of each other builds 18 inches. If you want to calculate the number of blocks req'd per square yard its: 2 blocks by 4 blocks. 450mm long x 215mm high x 100mm wide.