| accessdate =15 October 15,октомври 2006}} </ref> Due to historical variances in [[butter printers]], these sticks are commonly produced in two differing shapes. The dominant shape east of the Rocky Mountains is the Elgin, or Eastern-pack shape. This shape was originally developed by the [[Elgin Butter Tub Company]], founded in 1882 in [[Elgin, Illinois]] and [[Rock Falls, Illinois]]. The sticks are 4.75" long and 1.25" wide, and are usually sold in flat, rectangular boxes packed side-by-side.<ref name="cooksill">{{Harvard reference
