Needle System : HAX130N (Same as Schmetz 130N Topstitch needles) Organ HAX130N Top-Stitch needles are available in following sizes. Please select your size. Size 12 (Metric Size 80) Size 14 (Metric Size 90) Size 16 (Metric Size 100) Lower size numbers are narrower or thinner needles used for lighter materials. Higher size numbers indicate a needle of thicker diameter, used for heavier materials. This high quality flat shank top-stitch needles will fit most home sewing machines and home sewer based embroidery machines.