While all of the above are great suggestions, small doesn't translate to "easily handled". I have a couple of garters that are no fun to handle because they musk and they're like little coiled springs - if you drop your guard for a second they will fly out of your hands, hit the floor, and take off running.
Don't know what sex yours are, but that seems to be really common with male garters. Every female I've ever had was pretty chill, but the males tend to act kind of crazy like that, especially if they are housed solo.