2 panels
-- 2 panels options: 18 x 8 in 2 panels of 9 x 8 18 x 9 in 2 panels of 9 x 9 20 x 9 in 2 panels of 10 x 9 20 x 10 in 2 panels of 10 x 10

3 panels
-- 3 panels options:

4 panels
-- 4 panels options: