The Happy Beds Luxury Star Mattress is made using an open coil bonnell spring unit which gives whole body support. Beautifully made with classic multiple layers of fillings with a deep-quilted Belgian Damask fabric cover and finished with a modern upholstered design. This product is handmade in the UK, using the finest materials, conforming to the British standards. The open coil system maintains a medium support throughout the mattress. These mattresses inherently seek to contour to the body shape of any person resting on them. They are readily capable of maintaining the spine's double S shape and help prevent localised pressure points building against critical parts of the body. The Happy Beds Luxury Star offers a classic mattress made with quality damask material, which helps to create a comfortable bed at a comfortable price. Measurements (Select your choice of mattress size from the drop-down list above): 2ft6 Small Single: Length: 190cm Width: 75cm 3ft Single: Length: 190cm Width: 90cm 4ft Small Double: Length: 190cm Width: 120cm 4ft6 Double: Length: 190cm Width: 135cm 5ft UK King: Length: 200cm Width: 150cm 6ft Super King: Length: 200cm Width: 180cm Mattress Depth (Thickness): 18cm (7 inches) NOTE: Sizes are approximates and may vary slightly.