I've only seen the regular sized one. Stone Creek Creations is just a few miles from my home, so you'd think you could find them all over town, but not so! A friend of mine ordered one online. Very cool tool bags - it's on my wish list
Any way, I found an ebay listing which shows both the large and small in the same picture. It sure seems alot bigger! And, it includes the size: 13lx12hx8w
See it
here.