Kwik Kerb has a series of profile choices.  Since we specialize in strictly residential curbing, we use primarily the SLOPING BORDER profile.  You see this profile in all of the pictures represented on this site.  The width is the 7" which is the widest curbing in the industry.  The wider the curbing, the more material that is used, and therefore the strongest, most durable curbing you can purchase.  The height varies depending on the application.  The average is 4 to 5" on the tall side and 2 to 3 inches on the grass side.