These are 12 in diameter and will not fit 1/2 tons. Overall these range from poor to decent condition. 2 have been cut out to use on a 4x4 model. Besides that those two are in pretty decent shape.
Out of the 4 others one is very nice besides faded paint, two have some damage towards the center as seen, and the 4th is quite crunched and has some splits from where it is bent, that one probably wouldn't be worth trying to repair. Use the best 4 and have a spare.