SIZE 13ft 3.3ft 4in 13ft 3.3ft 8in 13ft 3.3ft 4in 16ft 3.3ft 4in 13ft 3.3ft 4in. COMFORTABLE & SAFE? – This gymnastic air barrel mat is very comfortable when you doing gymnastics or practice tumbling, back handspring, it is high resilience and it can be protect you from hurt when doing exercise.