This July 27, 2016, photo provided by Brad Williams shows the computer programmer's 9-month-old son Lucas Royce Williams lounging on a blanket next to a wrapped cheesesteak sandwich to compare his son's size, at their home in the Philadelphia suburb of Glenside, Pa. In a Wednesday, Jan. 3, 2018, blog post, Brad Williams outlined the "Cheesesteak for Scale" system he devised to measure his son's growth each month following the boy's birth in October 2015, according to (Brad Williams via AP)