Square mesh nets hang straight up and down, just like the net itself. Diamond mesh hangs sideways and is bulled from side to side. Some companies say that diamond mesh is better and some say that square mesh is better for these two reasons: Diamond mesh is pulled from side to side making the netting stretch absorbing the ball over several meshes, instead of one single spot. Square mesh is easier to assemble/sew and allows the net to hang more “true”. All of our retail products are square mesh, though some of our custom netting uses diamond mesh.