Frank Lloyd Wright "Saguaro Forms" 4 Pack Single Image Round Stone Coasters. Frank Lloyd Wright was one of the most renowned architects of the 20th century. He is often considered the pioneer of the Prairie School movement, which sought to create architecture that was in harmony with its natural surroundings. Coasters are printed with designs from Frank Lloyd Wright's Collections. Single Image, each Coaster has the same artistic design. Manufactured in the USA of absorbent stone to absorb excess condensation from beverages. Cork backing protects your surfaces from scratches and stains. Each Coaster measures 4.25” square. Beautiful artistic designs allow the Coaster to remain displayed even when not in use. This 4 pack Coaster Set makes a wonderful gift for family and friends at any time of the year.