21.30

4'10" 17 1/4" 2". 17.60L 4'8" 17 1/8" 1 15/16" 16.35L 5'0" 17 1/2" 2" 18.60L 5'1" 17 5/8" 2 1/16" 19.65L +4

4'10 x 16 13/16 x 2 17.5L 5'0 x 16 7/8 x 2 18.1L 5'2 x 17 x 2 18.9L 5'4 x 17 1/8 x 2 1/16 20.2L +2

4'10" 18 1/8" 2 1/16" = 19.3L 4'11" 18 1/4" 2 1/16" = 19.8L 5'0" 18 3/8" 2 1/8" = 20.8L 5'1" 18 1/2" 2 1/8" = 21.3L +5