Ear Plugs or Noise Canceling Head Phones and NSFW

[KaneKungFu123]

I would like to buy something to use exclusively while on an airplane. I dont want to listen to music or a DVD. All I want is something that will cancel out all noise and that is also comfortable. Do those cheap ear plugs work well, and does one size fit all(I have normal sized ears)?

edit: I dont want to buy the $300 Bose, because Im not planning on trying to watch DVDs/CD's on the plane rides.