Not sure I get the question. Are you asking about an option other than an integrated amp that you can use with the turntable that is not so big? If so, there were a few manufacturers who made mini-components back in the day that where about half the size of regular components - integrated amps, tuners, CD players etc.
Or are you just looking for something smaller than a integrated amp to act as a phono preamp? If so there are outboard preamps available, as long as you have a system of some kind to plug them into. A preamp doesn't work all by itself.
Regards,
Wayne A. Pflughaupt