This mattress is 140x70cm and 10cm deep to fit standard sized cot beds. It has a high quality, all round firm support and is made with only the finest quality materials. Each cot bed mattress is specially handmade in the UK and is the only cot bed mattress to be certified by the Soil Association as organic; guaranteeing great quality and helping to support local suppliers. Coconut Fibre - Unlike a traditional sprung cot bed mattress, our baby mattresses are made using a springy core of natural coconut coir (bound with natural latex) that acts as thousands of tiny springs. This helps to better distribute your baby's weight across the entire mattress and creates a more even sleeping surface, helping to reduce the risk of sagging. By using the natural latex (sap from the Hevea tree) as a binding material rather than in layer form, it combines the springy benefit of latex without compromising on the breathability of the cot bed mattress. Organic Welsh Wool - Three thick layers of organic welsh wool create the perfect support for your baby, naturally dispersing moisture to provide an anti-dust mite environment and help prevent the growth of any harmful bacteria (foam cot bed mattresses have been proven to encourage the growth of bacteria). The combination of the organic wool and cotton acts as a natural fire retardant, meaning that no fireproofing chemicals are used and each one of our organic baby mattresses passes UK fireproofing regulations (BS 7177) naturally. Organic Cotton Cover - Each cot bed mattress is finished with a non-removable 100% organic cotton cover. Crucially, this (along with the other natural materials) enables every cot bed mattress to breathe more easily, helping to control your baby's body temperature and avoid the risk of over-heating (as recommended by the NCT to reduce the risk of cot death). We recommend a breathable 70x100cm or 70x140cm Waterproof Mattress Protector, to create an anti-dust mite layer and protect your baby's mattress from any wetness. We also sell an organic bedding set. The set contains the following: Large Jersey Baby Blanket (75x75cm) Jersey Fitted Sheet and Waterproof Mattress Protector.