EntityQ421904· pop 31· linked from 91 articlesring binderSign in to saveloose-leaf binder with ring-shaped clasps that can be opened to pass through holes in the paperConnectionspaper sizeEntityISO 216Entitypunched pocketEntityUnited StatesCountryJapanCountryCanadaCountryUnited KingdomCountrySwedenCountryNorth AmericaEntityStuttgartEntityBonnEntitycompact discEntityInternational Organization for StandardizationEntityHelsingborgEntitynotebookEntitypolypropyleneEntityhole puncherEntitymemorandumEntitybook coverEntityhardcoverEntityCategories1886 introductionsGerman inventionsNotebooksOffice equipmentStationerySwedish inventions