Forever a staple, this plain ball stud comes on a nose screw which is one of the easiest styles to wear. the 7mm long twist or 'screw' shape is what keeps it securely in place without any risk of it falling out. The ball is 2mm in size, so a good medium fit and the screw has a gauge of 25. it's made of sterling silver and comes with a 925 stamp and it weighs just 0.1g.