These are the iconic Polyprop chairs, designed by British designer Robin Day in 1963 for the Hille company, produced under license by Anonima Castelli. It is one of the most famous and best-selling chairs in the history of design, known for being the first mass-produced chair with a single-piece shell made of injection-molded polypropylene. PERFECT CONDITION. Dimensions: Height 75 cm - Width 52 cm - Depth 48 cm - Seat height 44 cm. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution