12 size for you to choose .Gauge:6g(4mm),4g(5mm),2g(6mm),0g(8mm),00g(10mm),1/2"(12mm),9/16"(14mm),5/8"(16mm),11/16"(18mm),3/4"(20mm),7/8"(22mm),1"(25mm)
Package included :10 pairs of silicone ear plugs .(one pair of each color of the same size ).Size :4G(5mm)