I'm not sure how to solve this problem... but when I have used 4mm or smaller stones, faceted, heshi, roundels, rounds..doesn't matter... they seem to catch the hair at the back of my neck. I had a customer (fortunately a friend) who told me that a Spinel necklace I'd made for her was driving her crazy pulling her hair. I'm assuming it's because they are on a wire or string and not knotted... anyone have a solution for this issue.( Bead spacers at the back maybe...??.. the tiny clear plasticy/rubber/silicon ones) Any and all suggestions welcome !