Mid Century Parker Knoll Suite Two-Seater Sofa and 3 Armchairs in. Sofa: 120cm W, 89cm H, 90cm D, Seat height 42cm. Mid Century British design classic and this is a great example. As with most glass products, sensible precautions should be adopted which would include, but is not limited to, never placing hot objects on glass surfaces and understanding that (due to their age) glazed units, glass shelves and surfaces are unlikely to be made from safety glass and will thus have limited strength and weight-loading capacities.