I want to get a pet snake, but I want a small one.?

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You could at least have taken to Google before posting here. Most of these questions could have easily been answered by searching them on the internet. You don't need us to be your personal search engine.
That said, I'll go ahead and dispel some myths here. Most snakes don't typically have vampire-like teeth with fangs, but the nonvenomous ones commonly found as pets have a dental setup more similar to a shark, with many rows of same sized teeth meant for gripping. These types of snakes are typically constrictors. You will find they never do any surgical or teeth removing procedures on snakes that they sell online or in pet stores. This is simply unnecessary. There are no "breeds" of snakes, nor are there "poisonous" snakes. There are, however, many species of snakes that are common on the market, and these are usually nonvenomous or at least harmless. (Garter snakes and western hognoses are technically venomous, but the venom is harmless to humans. Granted these kinds of snakes hardly ever bite in the first place, even if encountered in the wild.)
Most of the snakes that will be recommended to you will be capable of growing upwards of 5 feet. While the idea of a 5 foot snake may seem impressive, it is not. One must keep in mind that long does not mean big and snakes are almost never stretched out full length. At 3 and a half feet, one of my ball pythons still seems unamusingly small. At 2 to 2 and a half feet, snakes at that size are comparable to large worms. Small snakes are also easier to lose, as they escape easier and tend to be more flighty. No snakes are social. They only come together for breeding, and they don't care about their owners. Male snakes typically are smaller than females, as females must be bigger to carry all those eggs! Handling snakes is usually done by picking them up with your hands, although bitey ones may be handled with a hook or other object.
If you really want a small snake, you can stick with kenyan sand boas, rosy boas, garter snakes, western hognose snakes, and african house snakes. These are often full grown under 3 feet. If you want to open up to medium sized snakes, you can look into the more common variety such as corn snakes, kingsnakes, rat snakes, ball pythons, hog island boa constrictors, and irian jaya carpet pythons.
And for heaven's sake, please research all this on the internet, and if by chance, join a reputable online reptile forum, like ball-pythons.net, redtailboas.com, cornsnakes.com and thamnophis.com. You won't regret it.