In the written terminology of various arts and trades, where two or more dimensions of the same piece or article are to be stated, this letter is a well-known symbol equivalent to the word "by." Thus, the formula "3 x 5 im" will be understood or may be explained by parol evidence, to mean "three by five inches," that is, measuring three inches in one direction and five in another. See Jaqua v. Witham & A. Co., 106 Ind. 547, 7 N. E. 314.