This product is a set of five vintage Metlox Poppytrail bread plates, each measuring 6 inches in diameter. The plates feature a glossy finish and a multicolor peach blossom pattern. They are made of ceramic and were manufactured in California, United States. The backstamp on each plate is printed.

All the plates have three of the dots on the back of the plates,  which I think is from the manufacturing process. I have shown this in the last picture.  If I can be of further assistance, please let me know.  Thanks for looking.