It's similar to the Collings SJ in size. A little smaller than a traditional jumbo.
Collings' "Small Jumbo" is patterned from a 50s Gibson acoustic. I'm sure it's a little different in dimensions from the Tonare, but not that much. What I can say, having owned both, is that the PRS has more complex and gorgeous overtones than the Collings, and is wonderfully responsive. It's like driving a Ferrari as compared to a family sedan. And this is meant as no offense to the Collings, which is one of the very finest acoustic guitars I've ever owned.
The Tonare is so great that I've started the process to get a private stock version, something I once said I'd NEVER do! LOL.