Halo Wedding Set Downloadable 3d ModelThe engagement rings head is separate and comes attached with a 1mm peg which can be used to solder if the head to the shank once the stones are attached. In the head of the engagement ring 1 6. 5mm round center stone, 18 1. 5mm round stones in the halo, and 12 1. 3mm round stones in the gallery. The shank for the ring can be set with 16 1. 65mm round stones. All widths for each stone setting has been made slight wider to allow for shrinkage during