What really boggles my mind is how much difference 1 cm does in leg opening. I don't have experience with suits, but I'm always changing opinions. I like the look of my Levis 501 which have 20 cms but I also like my Levis 511 which has a leg opening of 18 cms. I also have chinos with 18 cms (and a higher rise) and 19 cms and I like them both. It really depends on my mood and if I want to dress more classically or more "fashiony".