The Miracle Box Anti-Burst Peanut Ball, a Birth Ball but with a Twist. Birth Balls are commonly rounded, varying in size depending on the height of the mother-to-be ranging from 55cm to 75cm, and have many benefits to mums during pregnancy, labour and post pregnancy. However, a peanut ball, is what it says, peanut shaped, and comes very much into its own during labour. There are several different positions in which you can use the peanut ball. It is also incredible useful to help support your back and neck whilst in bed. Tested and certified anti burst exercises ball. It encourages foetal rotation and descent whilst on the bed. Helps to decrease first and second stage labour. Found to be very effective when having an epidural. Aids support and helps open your pelvis. Ball, plug, plug remover, tape.