14 KT White gold four prong setting. 3mm. square princess cut Cubic Zirconia looks like .20pts. diamond. Posts are shorter for kid's and have easy to use screw backs. Box included with purchase. To use hold earrings from the front and insert into the ear with the post facing your heart. Gently press the earring back on to the post and twist the back while holding the front of the earring 2-3 rotations towards you to close the earrings. To remove hold the front of the earring and rotate away from you. Do not over twist as this can puncture the back of the gold bell backs.