2 panels
-- 2 panels options: 18 x 25 in 2 panels of 9 x 25 18 x 26 in 2 panels of 9 x 26 20 x 28 in 2 panels of 10 x 28 20 x 29 in 2 panels of 10 x 29

3 panels
-- 3 panels options:

4 panels
-- 4 panels options: