Please note the earrings in the picture are magnified to show colours. The setting measures 4mm. 12 pairs of regular silver coloured stainless steel studex earrings which are ideal for everyday use especially if you have sensitive ears. Earrings feature each of the 12 birthstone colours from January to December in a claw setting. Earring posts thickness measures approximately 1.2mm (16 gauge) which are slightly thicker than normal fashion earrings. Post length 10mm. Earrings are packed in their original sterilized packaging as shown below and include butterfly backings to hold securely in place.