The Artis Elite Collection includes two Circle brushes. They each have the same size fibre bundle, about the size of a pea. The primary difference is the shape of the fibre bundle. The Circle 1 has a flat edge, allowing for a more precise delivery. It’s a great brush for a bold lip color and cut crease eyeshadow. The Circle 1R has a rounded edge, lending itself to a softer application that blends seamlessly. It’s a favorite choice for lip masks, blending eyeshadow and concealer.