Your baby will be spending a considerable amount of time sleeping in their cot so it is important to make the right choice. Choosing a baby cot can depend a lot on the amount of space available to you; whether to have the smaller standard size cot suitable for a baby from birth to approximately 2 years or a cot bed suitable from birth to approximately 6 years when converted to a junior bed. This choice should also take into account the type of mattress you will be using.