 The patterns were offered one size to a package until the 1980s, when slower sales made "multisized" patterns (which had several different sizes in the same package) more cost effective.At first, the pieces were not marked and no pattern layout was provided, leaving it up to the sewer to decide which piece was the collar, which the sleeve, etc.In the late 1890s, the company invented a method of identifying each piece (by means of a letter marked on it in a pattern of small holes), which was patented in 1899.