Not to burst your bubble, but you need to go get a digital scale. At best that skinny bass weighs 2.5 pounds. Most folks thinks they are bigger than they are. Invest in a good digital scale. It will educate you, as it did me.
We had scales with us. We weighed each fish. I do a LOT of bass fishing and can estimate pretty dang well, however, I did not have to estimate that fish. Maybe the pic isn't that great, but that's a pretty nice fish.