How much do you think this fish weighs I caught this eve?

Its a grass carp I caught this evening on 8 pound test

Here is a pic of the rod with a tape measure beside it , I figure the carp to be close to 3 feet ,  he was close to 5 inches wide at the base of his tail

Im not sure how much it weighed, but that is a huge carp!!  How did you catch him?  Come on, give us some details!  

I caught him on a bread doughball , using a size 1 octupus hook(not a circle style), I used 8 pound trilene xl and no sinker . I catch more of them with no weight so they dont feel resistance. It was a heckuve fight I would get him to the bank and he would run back out deep . It was like having a dump truck attached to my rod finially I waded out and got him close enough to grab . I need to invest in a net . There are some out here on the lake that are 4 feet plus long

here is another pic of him

He was pretty for a carp and had a tail about a foot wide

15-20 lbs. given my experience.