Mass. Gen. Laws ch. 54 § 44
The official ballots shall, except as otherwise provided in this chapter, be of ordinary white printing paper, of two or more pages, and shall, before distribution, be so folded as to measure not less than four and one half nor more than five inches in width and not less than six nor more than thirteen and one half inches in length. The names of all candidates shall be printed in black ink in lines at a right angle with the length of the ballot. The names of all candidates shall be in capital letters not less than one eighth nor more than one quarter of an inch in height, except that surnames and political designations of the candidates for president and vice president and the names of the candidates for the office of senator in congress shall be in capital letters not less than three sixteenths of an inch in height.
Mass. Gen. Laws ch. 54, § 44