The Wilton 1A is a large round piping tip with a 13mm opening — one of the most useful large tips in a decorator's collection. It is the go-to choice for piping thick outlines, bold lettering, generous swirls, filling cupcakes and creating chunky rope or ball borders. Made from durable stainless steel and dishwasher safe, it is built to last through heavy regular use. Key Details Tip number: 1A Opening diameter: Approximately 13mm Material: Stainless steel Compatible with: Standard piping bags, Ateco medium couplers Care: Dishwasher safe Brand: Wilton Best For Bold rounded swirls and domes on cupcakes and cakes Thick lettering and writing on cakes and celebration boards Filling cupcakes with cream, jam or ganache before frosting Large rope borders, ball garlands and chunky decoration effects Frequently Asked Questions What is the difference between the Wilton 1A and 1B tip? The Wilton 1A has a round opening (13mm) for smooth, round shapes, while the 1B is a large closed star tip that adds ridges to the piped shape. The 1A is best for smooth swirls and filling work, while the 1B creates textured star-effect swirls similar to a smaller closed star but larger in scale. What piping bag size works with the Wilton 1A? The Wilton 1A fits standard-sized piping bags (30cm or larger is recommended for comfort). It also fits Ateco medium couplers, allowing you to swap tips mid-bag. The large opening means this tip works best with stiffer buttercream consistencies to maintain the shape of the piped design. Browse the full range of piping tips and nozzles at Baking Pleasures, including individual Wilton tips and complete piping tip sets.
