The width of this product is much smaller than the original McKenzie lumbar half roll. Smaller people like me (5'6", 142 lb) will find it too small to provide proper postural support in large chairs or deep theater seats.The firmness of this roll is good.Be aware that the seller places a 15% restocking fee on returns as this was not stated in the listing for the item (this is a practice that Amazon should not allow without prior disclosure).