There are two ways to select the shape of your sign.
1- When you're on the product page, you'll see all the options to customize your sign in the top right corner of the page in the calculator. Any product that allows for shape customization will show the option to choose a shape there.
2- When you're in the design tool, you'll see an "Options" tab in the left-hand bar in the tool. If the product's shape is customizable, you'll see the "Shape" tab there.
