1.material:eco-friendly & durable pvc. 2.size:45-85cm diameter, regular or anti-burst quality 3.packing:color box or polybag yoga ball with stretch tubematerial: durable pvc(normal non-toxic quality, or phthalate/PAHs free quality)size:45-85cm diameter,regular or anti-burst qualityP.S.: can fill with sand inside ball, in order to get better fitness effect. 45-85cm gym ball