I'm planning to build myself a front bumper out of rectangular tubing. I'm just trying to decide what size tubing, 2x4, 3x6 etc. I've been looking at bumpers but I don't know what size tubing they are made of. Could you guys pos some pics or some links and let me know what size tubing the bumpers are made of? Thanks, I could really use the help

I know there are a billion bumper threads here, but I've been unable to find this.