yoga ball with rolling

1,diameter for option:12CM 16CM 18CM 20CM 25CM
2,Colour:blue,green,pink,lemon,orange,yellow,purple,grey,silver,black
3,advantage:
1)easy to open DIY by hand pump
2)all kinds of dots designs on the ball for choice
3)to meet different people group needs from children to adults to do DIY massager