I'm assuming you're talking about Sango from Inuyasha... That's the only Sango I know who wears a kimono. The kimono looks fairly simple, the sleeves might be hard, but I'm sure you'll find tutorials on how to make one like hers/similar to hers. Like Mangochutney said, you probably won't need a pattern.
Back from the dead after 3 years cosplay hiatus
In Progress Cosplays:
Ranma [Female Version] (Ranma 1/2) -Re-Do-
Kobayashi (Miss Kobayashi's Dragon Maid)
Shintaro (MekakuCity Actors)
Next Convention: Planet Comicon 2018