This illustration indicates the many piping bag tips available. This is a great reference when decorating cakes and cupcakes. As it will help you determine the size needed and purpose of each nozzle. Photo Source
As the online Food Editor, Janine Goodman, a trained chef and dedicated mom has a passion for creating easy to make dishes for the whole family. Whether its baking or cooking, her love of fresh produce and accessible ingredients make it a joy for readers to try her recipes.
What tip did you use for the frilly cake?, thats the reason i clicked on the photo.
It is a 1M tip. You can find the full tutorial at I Am Baker. Good luck!