Most recycled 3x5 ruled index cards are fine — just check the label.

You can pick recycled 3x5 ruled index cards for school without overthinking it. The main thing is to look for the words “recycled” and check whether you want wide or college ruled. That’s basically it.

Most big office supply brands — Oxford, Staples, TOPS, Muji if you’re feeling fancy — make a 3x5 ruled card with recycled content. The paper might be slightly off-white or a touch less smooth than new paper, but for flashcard studying, that doesn’t matter. Just make sure it’s not too thin. If it’s “60 lb” or heavier, you’re good. Lighter and your pen will bleed through.

If you’re ordering online, filter for “recycled” and “ruled” and double-check the dimensions on the listing. In a store, flip the package over and read the back. The rule is simple: 3x5, ruled, recycled. If it says all three, buy it.

Future you with a stack of