Indestructible waterproof material: You will never need a bookmark again, waterproof , tear resistant, will last forever as long as you use it as a bookmark Unique Design: Each Bookmark includes its Zodiac Sign, constellation and specific color plus the zodiac visual representation Size: 7x 2 inches, not to big for the smallest paperback , not too small for the biggest hardcover Albert Einstein was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics.