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Pick the right printable flash card size for your study material

Use standard index card dimensions, then generate flashcards from your own PDFs, slides, notes or photos of pages, and export them when you need paper.

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Choosing a printable flash card size

A printable flash card size that suits most students is 3 x 5 inches, the standard US index card. It fits in a pocket, leaves room for a short question on one side and a one-line answer on the other. Larger 4 x 6 inch cards suit longer definitions and diagrams.

Standard sizes: 3 x 5 inches, 4 x 6 inches, and A7 at 74 x 105 mm
Keep one fact per card so the answer fits the space
Use a photo of a textbook page if you do not have a digital copy
Export to PDF on Plus, then print at 100 percent scale

Example printable flash card size reference cards

What is the standard US index card size used for flashcards?3 x 5 inches, with 4 x 6 inches and 5 x 8 inches also common for longer answers.

What are the dimensions of an A7 flashcard?74 x 105 mm, about 2.9 x 4.1 inches.

Why keep each flashcard to one fact?A single fact is short enough to recall quickly, and each card can be scheduled for review on its own.

What fits on a 3 x 5 inch card?One term, a one-line definition or a short formula. Longer answers belong on a 4 x 6 card or should be split into two cards.

What does 100 percent scale mean when printing cards?The printer uses the file's actual dimensions instead of fitting to the page, so a 3 x 5 inch card prints at its true size.

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Your material, not a template

Upload a PDF, DOCX, PPTX, plain notes or a photo of a page, and get flashcards built from what you actually need to learn.

Spaced repetition built in

Cards come back at the right intervals, so you spend time on the facts you are about to forget.

Print or study anywhere

Study in the browser on the free plan, or export to PDF on Plus when you want a printed stack.

How it works

Upload your material

Add a PDF, slides, a DOCX, notes or a photo of a textbook page.

Review the cards

Check the generated flashcards and edit any that cover more than one fact.

Export when you need paper

On Plus, export to PDF and print at 100 percent scale so each card keeps its true size.

DeckOwl starts from your own material rather than a generic template. Upload a PDF, slides, a DOCX, plain notes or a photo of a page, and it produces flashcards you can review with spaced repetition. Printing is a paid feature: the Plus plan exports PDF, DOCX, Anki and CSV, so you can lay out a set and cut it to the size you need.

Start on the free plan with 3 generations a month and study in the browser, then upgrade when you want a printed stack. No credit card is needed to begin, and students get 40% off with a school email.

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Frequently asked questions

What size should a flashcard be for a single term and definition?

A 3 x 5 inch card is usually enough for one term and a short definition. Use a 4 x 6 inch card when the answer needs a diagram or several steps.

How many flashcards should I make for one exam unit?

Start with the key terms and facts from each lesson rather than every sentence, then add cards as gaps appear. Smaller cards with one fact each are easier to review than one long card.

Can I print the flashcards DeckOwl makes?

Yes, PDF export is included with the Plus plan at $39 a year or $7.99 a month. The free plan lets you study in the browser without exports.

Can it read a photo of a printed page?

Yes, photos of pages are read with text recognition, so you can make cards from a textbook page without retyping it.

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