Wow! Is this a great looking grommet or what? Though deceptively oval in shape it goes into a 3 1/8" round hole and features a flexible fin inside the grommet liner. This fin bends out of the way when cords are passed through and flips up to block the two slots when not.
Size: 4 9/16" long by 3 1/2" wide, liner is 7/8" deep.
Liner is charcoal, choice of cap to match or contrast.