I don't know about the police, but there are definately height, weight, and body fat standards in the military. Unfortunately, the Army was extremely undermanned just a couple of years ago, and it was nearly impossible to boot anyone out. In 2005, my unit deployed at roughly 110% strength. In 2008, we deployed at less than 80% strength. I didn't have any Soldiers with weight problems, but I had a few with other issues who certainly shouldn't have been there. Now that the war in Iraq is winding down, the Army is downsizing, and I expect many of them will be sent packing.