Pins Nickle Plated Steel - The Best Size for Sewing Slipcovers #28 - 1 3/4 Inch or #32 - 2" Long T Pins. Nickel plated steel T-Pins with smooth sharp points that will not pull threads in synthetic fabrics. 50 Pack Size #28 1 3/4" 400 Pins Box #28 - 3/4" 50 Pins - #32 - 2" 350 Pins Box #32 - 2"