Time for a RAM Upgrade!

Hey everyone, around November 2017 I built a PC for the first time. At the time RAM was rather expensive and I didn't have too much room in my budget, so I skimped out and only got 8 GB of 2133 MHz RAM. Now that I have a little more money, I'm thinking to upgrade to 16 GB or possibly 32 GB. I have a Gigabyte AB350 and a Ryzen 5 1600, and according to Gigabyte and AMD, the maximum RAM clock speed I can get seems to be 2667 MHz without overclocking. Does anyone know what RAM kit I should get that would fit what I'm looking for?

Thank you! :)