Specification: Color:Blue,Purple,Light Red Material:PVC Diameter:45cm/55cm Theme:Sports Sport Type:Pilates,Yoga,Gymnastics Type:Balance Suitable for:Child,Pregnant woman Note: 1.please allow 1-3 cm/ 0.39-1.18 inch difference due to manual measurement and 3-5 g/ 0.007-0.01lb/ 0.11-0.18oz for the difference between different colors 2.due to the screen difference, the color may be a little difference from what you expect, please allow it Packaged include: 1 x yoga ball Sitting for a whole day, you feel so uncomfortable that you put some of your weight on this yoga ball and do the exercise as a way of alleviating some back and hip pain How can you storage this ball with less space? Just take out the airlock and then let out all the air inside, then you can can a flat yoga ball. Next time, you just need to inflate it and then add the air lock to get a round yoga ball When you lay down on the ball, the soft PVC surface supports you and brings the comfortable feelings for you As for pregnant woman, if you have a kid, sometimes she/he may feel she/he is ignored. You can take out this small balance fitness ball and do the yoga with her/him to improve the bond between you and your child If your family members or friends like pilates, yoga, gymnastics or fitness, you can send this exercise ball as a gift