We have a generous selection of both Olympic (2" diameter holes) and Standard (1" diameter holes) weight plates in both cast iron and rubber coated finishes. We also carry premium Olympic Bumper Plates. Bumper plates are solid rubber weight plates that fit Olympic bars. They are all the same diameter regardless of weight (they will be the same size as the 45 lb plate at your local gym). Bumper plates were developed to train for the Olympic lifts and are solid rubber so they can be dropped on training floors causing little or no damage. Competition bumper plates are colored while the training plates are black. Rubber coated plates will protect your floors but not nearly as much as bumper plates. If you are not planning on dropping your plates frequently then rubber coated or cast iron plates are a good option.