CARD BUYING GUIDES

Find the Right Cards for the Way You Work and Learn

Card size, paper weight and paper type all affect how a card feels and performs. Use these practical guides to compare your options and choose confidently.

Start With the Basics

These guides answer the questions buyers ask most often before choosing index cards or flash cards.

Size Guide

What Is the Best Flash Card Size?

Compare popular card sizes for vocabulary, formulas, presentations, study systems and more.

Compare Flash Card Sizes
Weight Guide

Cardstock Weight Guide

Understand how 90 lb, 110 lb and 140 lb card stocks compare, including the difference between pounds and gsm.

Compare Cardstock Weights
Paper Guide

Index Stock vs Cover Stock

Learn why two papers with similar weight labels can feel different and which surface fits your intended use.

Compare Paper Types

Shop and Learn by Card Size

Explore the benefits, common uses and available options for each card size.

2 × 3.5 Mini cards for compact study systems, drills, organization and specialized workflows. 3 × 5 The familiar everyday size for studying, notes, recipes and organization. 4 × 6 More room for detailed notes, presentations, projects and visual learning. 5 × 8 A spacious card for outlines, teaching materials and information-heavy subjects.

Ready to Find Your Cards?

Browse all of our index cards by size, color, paper weight and punched or unpunched format.

Shop All Index Cards