Stretchrite 3/4-Inch by 30-Yard White Buttonhole Knit Elastic Spool This ingenious buttonhole elastic is perfect for growing kids, maternity clothes and many more uses as it is designed for changing waist lines and widths The elastic is made with buttonholes already inserted and spaced about 3/4 inches apart from each other down the center This allows you to get longer wear from clothing by buying length and easily adjusting by tightening or loosening to the desired snugness as needed Each spool contains 30 yards of elastic that is 3/4 inch wide 67 percent cotton, 33 percent rubber