The most popular type of bullion products would have to be the Johnson Matthey, Credit Suisse and Pamp Suisse bars, all which are .9999 fine gold. Depending on your investing needs, there are many different weights and sizes that can vary from 1 gram to over 100 ounces.
Buying Option #1: Find a Local Gold Silver Dealer and buy the physical products at the store. Store it at home or in a bank's safety deposit box.
Buying Option #2: Buy online from reputable dealers online and have the products delivered to you. Some of the well-known dealers:
Buying Option #3: Buy online from credible dealers and store your gold or silver at a remote vault/storage place such as BullionVault.