The most common standard cot mattresses sizes include: Cot Size (120cm x 60cm): This is the standard size for most cots and is suitable for newborns and infants. Cot Bed Size (140cm x 70cm): As your child grows, you may transition from a cot to a cot bed. Cot bed mattresses are slightly larger to accommodate the larger sleeping surface.

Dimensions: Typically, a cot mattress is narrower and shorter than a standard twin mattress, usually measuring around 75 inches in length and 30 inches in width. Design: Designed for portability and ease of storage, cot mattresses are often thinner than regular mattresses, making them easy to fold or roll.