clear glass cabochon,flat base with domed top round,drop,rectangles,heart,square,oval ... we have two choice.One is flat base with domed top,the other is with two flat sides. Following are existing sizes ... we have,we can also produce custom sizes.round glass cabochon:8,10,12 ... :16mm,18mm,13.5mm,23.5mm,25mmoval glass cabochon:10*14mm,13*18mm,18*25mm,19.5*29mm,30* ...