Flash cards are cards used for note-taking, learning, and working. Word cards are suitable for offices, homes, and any place you want to use.SpecificationColor: White, BrownCard Material: PaperRing Material: SteelRing Size: 2.5 x 32mm / 0.1 x 1.26 inch(T*ID)Card Size: 90 x 57 x 0.3mm / 3.54 inch x 2.24 inch x 0.3mm(L*W*T)Number of Holes: 1Packing List: 300 x Message Cards, 6 x Loose Leaf Binder RingsAdvantage1. The note card is exquisite and compact, easy to carry when going out, and does not take up space. Index cards feature curved corners to prevent scratching your fingers. The equipped loose-leaf ring can string up the paper for easy storage and organization.2.