this review title is: less than half of the specified size and the content is: the specified size of the stone is x x the actual size is x x only of specification this is way beyond any margin of error in the manufacturing process you should also note the estimated delivery date although it says prime free shipping it took a week to arrive in first class mail.there are other information for this review, one is this reviewer did purchase it and the other is 0 people think this review is helpful.