To make Tortillas or low-carb taco shells the same size is pretty easy. You can use various options. 1. Make one tortilla and circle around on the parchment paper, so all the next ones will be exactly the same size. 2. Find a bowl which is similar to the size you want and use that to make circles on your parchment paper. 3. Use your kid's compass to be fully precise - my option s you see on the video.