Reusable Dry Erase Tracing Cards! Perfect for Little Ones Learning their Letters and Numbers. INCLUDES: 31 cards printed front and back (26 Uppercase Letters, 26 Lower Case Letters & 10 Numbers). EXTRA LARGE cards for little hands: 14.2 cm x 16.3 cm. REUSABLE: Use them OVER and OVER again! Works with any dry or wet erase markers.