12x12 12x16 14x18 16x16 16x20 18x18 18x24 20x20 20x24 24x24 includes 1) 24" crossbar 24x30 includes 1) 24" crossbar 24x36 includes 1) 24" crossbar 30x36 includes 1) 30" & 1) 36" crossbars 30x30 includes 2) 30" crossbars 30x40 includes 1) 30" & 1) 40" crossbars 30x60 includes 2) 30" & 1) 60" crossbars 36x36 includes 2) 36" crossbars 36x42 includes 1) 36" & 1) 42" crossbars 36x48 includes 2) 36" & 1) 48" crossbars 36x60 includes 2) 36" & 1) 60" crossbars 36x72 includes 2) 36" & 1) 72" crossbars 40x40 includes 2) 40" crossbars 40"x48" includes 2) 40" & 1) 48" 40x60 includes 2) 40" & 2) 60" crossbars 48x48 includes 4) 48" crossbars 48x60 includes 2) 48" & 2) 60" crossbars 48x72 includes 3) 48" & 2) 72" crossbars 60x60 includes 4) 60" crossbars 60x72 includes 3) 60" & 2) 72" crossbars