Ribbing is sold by the running INCH and the minimum ribbing order is 4 inches. To order, decide on the width of the cuff or waistband, double that width and add 1". For instance, a 3" cuff would require 2x3+1 or 7".
See our instruction on sewing in ribbing cuffs at http://www.rockywoods.com/Fabrics-Kits/Cuff_and_Jacket_Ribbing/Sewing-a-Ribbed-Cuff
Nylon/Wool/Lycra Blend Medium Weight Ribbing
Sold by the running inch, minimum of 4 inches