Small size fits 2.00mm - 4.5mm
Large size fits 4.00mm - 6.5mm
By putting the point protectors on, double point needles can be used as single point needles with nob. The protectors keep your stitches from slipping off the needle when putting your work down. The protector is light, easy to put on and will not slip off. Tulip shaped point protectors will not roll off the table, unlike rounded and conical ones.