Wrapfilm System's Non-Slip Disposable Piping bags are the industry standard used by most pastry chefs. They measure 21" (53cm) from corner to corner, so when rolled into shaped, they will hold plenty of filling. Made of strong, non-slip blue plastic film, just tear a fresh bag from the roll for each type of filling; more convenient and more hygienic than traditional cloth bags. For general use, load the bag with filling and snip off the pointed end depending on how thick you want the piping to be. Alternatively, cut off the end and insert your preferred piping nozzle before loading the bag.