Silver Scalloped Oval 1" 28-Petals Concho Style Shank Back Button #SWC-165
Antique silver and medium shine, it's 1" the long way and 3/4" the short way, and about 1/4" thick (quite sturdy) including the shank. Shank opening is about 2.5mm. Consistent button to button; not USA-made. Sold per button.