I have a wonderful table on bed risers which bring it to exactly the height I need. The table is a 3/8" thick sheet of glass set in a brushed aluminum frame. It's solid and steady. I acquired it as a gift from a dear friend who was cleaning out her summer house and no longer wanted it.
One thing I do before sewing my blocks is double check their measurements. I often find a slight trim around the edges is necessary to obtain the perfect size.