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.
~Currently On Convention Hiatus~
In Progress Cosplays:
Young Link (LoZ:MM)
Kyogre [Battle Armor Gijinka] (Pokemon)
Ranma [Female Version] (Ranma 1/2)
Too Many to List OTL
Next Convention: Cosplacon 2015 (Possibly)