2 panels
-- 2 panels options: 18 x 22 in 2 panels of 9 x 22 18 x 24 in 2 panels of 9 x 24 20 x 25 in 2 panels of 10 x 25 20 x 26 in 2 panels of 10 x 26

3 panels
-- 3 panels options:

4 panels
-- 4 panels options: