Welcome to the forum, Ruth! Alan asks the same questions I would ask: do you have an intended tow vehicle, how and where do you plan to camp, and what features are you looking for? It's helpful to distinguish must-haves from nice-to-haves.
“Small” is relative. Be aware that molded fiberglass manufacturers designate models by overall length, tongue to bumper (that’s the older convention). Cabin length is about 3’ shorter unless there’s an extended tongue for storage. So, our 13’ Scamp
has a 10’ cabin.
Molded trailers with stand-up headroom range from 12’ to 25’ (with a couple of rare larger exceptions. If they have a bath at all- ours doesn’t- most have a wet bath (toilet, sink, and shower in one waterproof space).
Towing weights start a bit under 1500# and go up from there. The thread “Trailer Weights in the Real World” in the General Chat section has data on what various makes and models weigh when loaded for travel. Post #401 links to a spreadsheet of the data.
Best wishes in your search. We have enjoyed our 13’ Scamp