The external thumb safety is on the other side.
Oh, yeah, I know - that wasn't intended as a criticism of the Sig at all. Great gun. Almost bought one and I may yet. When Kimber first shipped the Micro 9 they sent ONE six-round magazine with it, the cheap bastages. One mag. And for several months you couldn't even buy a separate one because they weren't in stock. That's why two of mine say "Sig Sauer" on the baseplate. They work perfectly.
That external safety is, to be sure, a little difficult for pocket carry since you have to dive a little deeper for a proper grip prior to the draw stroke. I think it's worth it, though. Pocket carry is deep concealment, it won't be fast.
I've pretty much gone to belt carry with a gun that size, though. It prints less than my cell phone. If you have any good holster recommendations I'd be grateful.