About this item

• 4 inch therapy ball good for release hip flexors, lower back & thigh muscles pain relief. Note 1, If you use it for other needs such as pilates,yoga or other exercise, please note that this ball is 4 inch
• Easy to inflate with the needle pump, no need plug. Note 2, the ball you received in deflated status
• 4 in ball. About the size depends on the degree of inflation, it may between 4″-5″. you can refer the post pictures(the one with the scale), and the image upload by others. Note 3, If you have special requirements for the size, please check the size
• Sturdy and thick ball, not soft. Please note it 50% thicker than the 8 inch or 9 inch ball. Note 4, If you are not especially looking for this kind of hard ball, it may be a little thick for you, not soft enough
• Ball is not perfectly round, you can refer the picture uploaded by others. If you need it very round, you can take an electric air pumps(not included in the package). Note 5, most likely the ball you inflated, a bit like an ellipse