Midori MD Cotton Letter Pad Lined. This writing pad is made with 50 sheets of the amazing Midori MD cotton paper, and was designed for writing letters. Midori created a unique size that they found was perfectly suited for a typical letter—about 6.6 x 8.2 inches. Wide margins give your letters an elegant look, and the lines, printed in light gray, are spaced 9.5 mm apart, the perfect spacing to allow comfortable writing without making your words look too cramped or loose.