Amazon.com : 3 Ring Binder 1.5 inch Binder, 1 ½ Inch Round Ring Binders, Colored Binders for School Supplies, Printed Inside and Outside, Used for Papers, Business Cards Etc., Holds 280 Sheets,
2" Side & Top Open Molded Ring Binders
Amazon.com : 3 Ring Binder 1.5 Inch,Round Ring with Pockets,Holds 8.5" x 11" Paper,Assorted Colors, 4 Pack : Office Products
Mini 3-Ring Binder (8" x 9"), 1" Rings, Reinforced Metal Corners, Pom Design Soft Touch Cover (55749) | russell+hazel
Amazon.com : Samsill Plant Based Durable 3 Inch 3 Ring Binders, Made in The USA, Fashion Clear View Binders, Up to 25% Plant Based Plastic, Assorted 4 Pack (MP48689) : Office Products