Buy Gold Coins carry the UBS gold bars in a number of sizes, including the 1 gram, 2 gram, 5 gram, 10 gram, 20 gram and 1 Ounce size. Each bar comes sealed in a UBS certicard that contains the weight, fineness and serial number of the bar. All smaller sized UBS gold bars are Kinebars, which means that they have a hologram on the back to confirm their authenticity.