♡ Comes with a butterfly back ♡ 365 day guarantee included for free (read more) ♡ You receive one stud. For a set, please select two pieces Size: The stud is 6,5 mm by 4,6 mm with a 10,5 mm long post Material: High quality gold plated using 1 micron 18 karat gold with zirconia stones set in it