I was going to hunt down an eleven year old, cut their hand off and then measure it at home but I realized that not every eleven year old would have the same size fist and, of course, not every frog any given size has stopped growing...
The description isn't really enough to make a worthwhile guess... people could name frogs that fit that description all day and might still not identify your species. If you have a camera and can post a photo of it, I have little doubt that it could be identified quickly and easily... if you don't, then I'd suggest loading up amphibiaweb
http://www.amphibiaweb.org/ and just browsing photos for a few hours.