Originally Posted by DeanB
I think Brian posted that the roll could be up to 15 cm diameter. Also, he seemed to indicate they could have a flat bootom. No mention about the shape of the top. Are the rolls being tested made from exercise rolls or are they like a sausage=shaped bean bag?
Mix of yoga rolls and home made, some round and some rippled with a flat underside. Round works better foot side up I've found.