Indented in center...Show slight rub wear on bottoms...Glass has a swirled look...2.5" dia at bottom,,,Marked Pat. 1/15/24 and Original Sliders...If you want to buy more than one item in our store, please pay for each and when you get done we will send you a revised invoice with shipping combined (when possible) and refund any extra postage you have paid.  Typical in this store.  Feedback WE LIKE it....