Clover has come up with an extra small “Triangular” shaped Stitch Marker (No. 3148). This shape is ideal when set on the round knitting needle because it produces the perfect eyelet for inserting the needle tip in the marker as you pass it from one needle to the next. So for all you sock knitters making fabulous designs in your socks, this is the stitch marker for you! Fits needle sizes US 0-4.