3 position adjustable mattress base - allows you to lower the height of the mattress as your baby learns to sit and stand. Drop side - this allows you to lower the rails so it's easier to lift your baby in and out. Teething rails - protects your baby's gums once they are teething and have started to chew. Cot specifications:Size L125, W69, H97cm. Mattress features:Mattress size L120cm, W60, D60. Mattress not included. General information:Suitable from birth to 4 years. Self-assembly. EAN: 5021669803288.