This depends on what you prefer your outdoor brick pizza oven to look like. You can go for the look of a dome, but be prepared to spend a lot of money to achieve that look. You will need much more than 40 bricks, a lot of cement, and some additional tools (like grinders) to make a domed oven. Not only are domed pizza ovens more expensive, but they also take more time to make. If you are looking to make a DIY brick pizza oven fast and simple, the domed look isn’t the way to go.