The Brother Universal Sewing Machine 5-Piece Needle Set contains an assortment of sizes for various uses. Included are two size 11 needles for lightweight fabrics such as silk, voile, taffeta and chiffon; two size 14 needles for medium weigh fabrics such as cotton, linen and satin; and one size 16 needle for heavy weight fabrics such as denim, corduroy and tweed.