My herding ball isn't filling out the cover—was I sent the wrong size?Updated 3 months ago

The yoga balls that we use to fill out the herding ball have a lot of stretch to them, and they also take a long time to blow up fully. There will come a point where the ball looks fully inflated but the cover is still loose on it, and this just means that you've reached the point where the ball has enough air in it to round it out, but it isn't done inflating yet. 

The next step is to continue pumping air into it to stretch the ball, and this can be more difficult when you are only using the included hand pump. To make the process easier and faster, you may want to use a floor pump, an electric pump, or an air compressor. The medium (22" diameter) ball can be blown up using the air pumps at a gas station if you can fit it in your car; the larger size (30" diameter) will probably be too big to fit in a vehicle once it has been blown up. 

Regardless of the pump used, continue pumping air into the ball until it has stretched to pull the cover taut. The ball is designed to match the size of the cover and will not explode or pop, so do not be afraid to keep pumping until it reaches the intended size.