The Reading Series Small Letter Cards offer a comprehensive set of uppercase and lowercase A-Z cards, perfect for young readers grades K-2. Published by McGraw-Hill Education, these flashcards are designed to help beginners learn and review their letters. Each card is 4.5 inches in length, 2.6 inches in height, and 3.3 inches in width, making them convenient for handling and studying. With a total of 260 flashcards, this box set is a valuable resource for improving literacy skills in a fun and engaging way.