Cot bumpers What size to choose? Cot bumpers create a reassuring cocoon around baby and create a soft, protective padding around the crib. They come in many different sizes. The biggest (max 360 cm) will go all around a 120 x 60 cm cot, however most are placed around just half (min 180 cm). It’s up to you to decide depending on what you want and which model you have. 36