I got in my ninja costume last week for a them party this weekend. It was purchased via Amazon, and while I'm on the subject: attention retailers--"Standard" is not a size!!
I went with the "full cut", which seems to be polite costume-store-speak for "tall and/or portly". And I'm glad I did, because if that's what a "full cut" is, I would no-way-in-hell fit into a "standard". Seriously. I'm not a small man, I'm 6'2" and 1/8th of a ton (or nearly), but I'm not "portly".
Anyway, check out the picture below of me in my ninja costume.