1 4 Radius Countertop Edge . The counter core radius is 11 1/4. Because of the smooth edge, wiping down the countertop can lead to messes on the floor. Edge Profiles » Bedrock Granite Co. from bedrockgranitecompany.com The tight 1/8” radius on the edge blends effortlessly in contemporary and transitional styled homes. Its slight curve maximizes the visual thickness of the countertop. You can also have just the top edge beveled or have both the top and.