... class GH----Professional high quality (prong,spring,sewing) snap buttons top manufacturer.1). We can design for ... 666#, 777#, 888#, 999#, 999.5# & 30mm Prong snap buttons.6). Pearl sizes: 7.8, 9, 10, 10 ... RUSTY46ANTIC COPPER RUSTY47GREEN COPPER ALLOY48FLOWER ALLOY18). All Prong snap button types TypeA part sizeBCD parts sizeA part B part ... 4mm/25mm/30mm29~30mm30mm30mm/29mm/ GH Button --- Pearl Snap Button