Answer Hello Joan! Unfortunately, the manufacture does not list the actual dimensions of this dishrack. You can view the picture of the dishrack, WPW10243301, each square in the backdrop is 1". This will help determine an approx. size. Viewing the model given, MDB8600AWB, the dishrack part number WPW10243301 is the correct replacement. Thanks. Read More... Answered by AppliancePartsPros.com | Monday, October 17, 2011