This is a 6-prong, long-claw type earring setting. Post length: approximately 10mm Post wire diameter: approximately 0.65mm Earring setting for 4mm round cut stones. Because it's a pressed setting, no advanced skills are needed for prong setting. Those who enjoy crafting should be able to set the stones easily. For 4mm round stones, those with less thickness or a smaller diameter are easier to set. Some stones may not be able to be set depending on the stone. If you would like multiple pairs, please contact us.