インデックスカード：サイズ・用途・無料印刷
3x5・4x6などのインデックスカードのサイズと使い方。PDFダウンロード。
Index cards (also called notecards) are small, stiff rectangles of paper used for study notes, flashcards, recipes, and quick reference. Standard index card sizes include 3×5 inches and 4×6 inches—the same dimensions as notecards. They fit easily in pockets and binders, making them ideal for portable note-taking and spaced repetition.
What are index cards used for?
Index cards are versatile. Common uses include:
- Flashcards for vocabulary, definitions, or exam prep
- Study notes when each topic fits on one card
- Recipe cards in a kitchen file box
- To-do lists or project task cards
- Presentation cue cards for talks
The small format forces you to distill information, which helps retention.
Standard index card sizes (notecard sizes)
| Size | Dimensions | Best for |
|---|---|---|
| 3×5 in | 76 × 127 mm | Flashcards, short notes |
| 4×6 in | 102 × 152 mm | Recipes, longer notes |
| 5×8 in | 127 × 203 mm | Large cue cards |
3 by 5 index card and 4×6 are the most common. US sizes match ANSI standards; international equivalents exist in A-series (e.g. A7 is close to 5×7).
Printable index cards: 3x5 and 4x6
You can print index cards on letter-size paper and cut them out. Multiple cards fit on one sheet.
- 4×6 index cards on Letter: index-cards-4x6-letter
- 3×5 index cards on Letter: index-cards-3x5-letter
Download the PDF, print at 100% scale, then cut along the dashed lines. Use cardstock (65–80 lb) for durability.
How to use index cards for studying
- One concept per card—front and back if needed
- Write a question on one side, answer on the other
- Shuffle and review for active recall
- Separate cards you know vs. need more practice
Spaced repetition (reviewing at increasing intervals) works well with index cards.
Printing tip
Print at Actual Size / 100%. Scaling will change the cut dimensions. Choose the correct paper size (Letter or A4) in your print dialog.
For more on paper sizes: A4 vs Letter.
Related articles
- How to choose notebook paper—compare ruled, dot grid, and graph
- Best line spacing for notes—college vs wide vs narrow ruled