Larger than I expected and solid feel like. The only cons is the curve is not snapped under wheel smoothly and there is a gap between curved surface and wheel line. So I do not know if it is really working or not because the function of chock is for the accidental circumstances the car slipped back,however, it is not usually happened when the car is put on the parking gear and hand brake is applied.  So hard to say it's good or working, unless the car is really accidentally slipped back and blocked by this wheel chock.  Then you can finally see if the chock is good or not.  But anyway,  it worths that money.