As of Jan. 13, 2016, streaming services that offer the full version of "Dumb and Dumber" include iTunes, Google Play and Amazon Video. The film is available for digital rental through these services for as low as about $3.
"Dumb and Dumber" is available for rental on Amazon for about $4, as well as for purchase for approximately $13. Amazon also features the film's sequel, "Dumb and Dumber To," as well as a spin-off, "Dumb and Dumber: When Harry Met Lloyd." These films are also available for purchase, though only the latter is available for rental. Amazon also offers "Dumb and Dumber" on Blu-ray and DVD.