The most common stone thickness locally is ¾”. The most common treatment of ¾”material is to laminate another ¾” strip to the front finished edge of the stone resulting in a visual appearance of 1 ½”. The underside of the counters are filled in with ¾” thick plywood laminated to the stone. About 30% (and increasing) of the locally available material comes in 1 ¼” or 3cm thickness. Usually 3cm material is solid all the way through with no laminated edge.