Tiffanys style ring-size 16mm...Gems 1pc-5.5mm,20pieces-1.5mm..Weight-silver-1.48 gr..gold 14k-2gr..gold18k-2.20gr... You can see the dimensions and weight in the last photo.All stl files was fixed in materialise magics and ready to print on 3d printer or cnc wax milling . Please contact me if you have questions or need assistance with the models. If you need another size - contact me. Designed for 3d Printing. THIS MODEL CORESPOND TO ALL JEWELLERY MANUFACTURE REQUIREMENTS !!!