Vintage Art by Maria Sibylla Merian (1647–1717): pioneering artist of flora and fauna. • Paper weight: 189 g/m² • 0.26 mm (10.3 mil) thick • Solid oak frame • Acrylite front protector • Hanging hardware included • 21 × 30cm posters are size A4 How to attach hooks on 61 × 91 cm horizontal frames: Place each of the mounting hooks 2.5 cm from frame corners when hanging horizontally. This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!