The design is called Laurel, and is popular in both the copper set (shown here) and the enameled versions. It is simple and yet very effective in design. Circa mid 1950s.
The size of the pin is 2 1/8 x 1 3/4" and the earrings are clip backs and are 1 1/4 x 3/4" in size. Signed Renoir © on the back. The pieces are shown in the Burkholz book called Copper Art Jewelry on pages 86 and 132.
This fabulous Renoir "Laurel" copper brooch and earring set is in excellent vintage condition and is available at my Vintage Jewelry Lane store for $87.99