What is an Index Card?
An index card is a small, rectangular piece of stiff paper or cardboard used to jot down notes, organize information, or store key data. These cards are often used in educational institutions, libraries, research centers, and businesses to keep information in an orderly and accessible format.
Index Card Sizes in the US
The standard index card size in the US is 3 inches by 5 inches (76 mm × 127 mm). This size is the most widely used and is available in most stores selling stationary supplies. The index card size is based on the American National Standards Institute (ANSI) standard, which was established in the early 20th century as part of an effort to standardize paper sizes in the US.
Other Index Card Sizes
While the 3×5 index card is the standard in the US, there are other sizes available. The 4×6 index card is another popular size and is favored by those who need a little more space to write. There are also smaller sizes, such as the 2.5×3.5 size used by many collectors to display baseball cards or other small mementos. Larger, 5×8 size cards are also available for those who need extra space for their notes.
Uses of Index Cards
Index cards are incredibly versatile and can be used for a wide range of purposes. Here are some common uses:
- Flashcards for memorization
- Notes for research and writing projects
- Cue cards for speeches or presentations
- Outlining plot points for a novel or screenplay
- Organization of contact information
While there are different sizes of index cards available, the standard index card size in the US is 3×5 inches (76 mm × 127 mm). These versatile cards are used for a wide range of purposes, from studying for exams to organizing contact information. With their compact size and ease of use, index cards remain an indispensable tool for students, researchers, and professionals alike.