20 opal nose studs make up this pretty set! featuring 4 of each colour opal, this set includes light lilac, forest green, pearly pink and ocean blue opals, with each stone being 1.5mm in size. the gauge size of the stud is 24ga and is 7mm in length. Being ball end studs, you simply insert them into your nose and the ridged ball end will keep it in place. Each stud weighs just 0.1g and is stamped with 925 for sterling silver.