3 Sizes: 4/8" hemmer foot (13mm wide rolled hems), 6/8" hemmer foot (19mm wide rolled hems), 8/8" hemmer foot (25mm wide rolled hems). The shape of the rolls in these hem feet make it very easy to fold the hem and they do grab the fabric very well so it isn't a pain to keep it lined up,when we hem some thicker fabrics or some more normal hems,instead of the narrow hem foot,we have a half inch , a 3/4 inch and a 1 inch wide hem foot,for example if you wanna hem a cotton skirt,you can choose the half inch hem foot. If you want to confirm whether your sewing machine is a low shank machine or not,find the thumb screw that holds the foot on the machine. Measure the distance from the center of the screw to the floor plate. If it measures 1/2 inch you have a low shank machine. Fits for All Low Shank Snap-On Singer* (Some Singers Require Low Shank Adaptor), Brother, Babylock, Euro-Pro, Janome, Kenmore, White, Juki, New Home, Simplicity, Necchi and Elna Sewing Machines. Package include: 3 x Rolled hem foot.