#4 Size COBALT, No Rings in interior bottom. Metal marks or mixing marks on. YELLOW, No rings interior bottom. #6 size RED, Rings in the interior bottom. Very small chips around the rim. Tiny mixing chips interior bottom. I noticed an area where the color appears darker on the interior at the top and a dark color area on the exterior. Still a beautiful bowl. These bowls are pottery so the color can’t always be perfect. See pictures for the size measurements. The years I have determined for these bowls are from. Information from the book Fiesta, Harlequin, Kitchen Kraft Dinnerwares. A Schiffer Book for Collectors. If you have any questions or need more pictures, please ask.