Muji Ring Binder 2 Ring PP Clear No Color A5 / B5 / A4 - Etsy
Amazon.com : Lever Arch 2-Ring Binder; U.S. Letter Size; for 2 3/4" (7 cm) Center-to-Center (cc) Paper Punches (Not for A4 Documents with 8 cm cc Spacing) (1 Assembled Binder, Red) : Office Products
Rexel Budget 25mm 2 Ring Binder A5 Black (Pack of 10) 13428BK