The correct hood for the 18-55 looks like it is EW-63C, which is a bayonet mount. It has the red dot. But, it looks like Amazon sells lens hoods of various sizes for cameras; there is a threaded 58mm petal lens that would fit the front element. If that is what the OP has it should be returned.
John Hoffman
Conway, NH
R6 Mark III, M200 (converted to infrared), RF lenses, Pixma PRO-100, Pixma TR8620a, Lr Classic
