And welcome to the forums. Stef is right... you've found a whole world of cool stuff to see and learn.
FWIW, the smallest trailer built by Airstream that was fully self-contained was the original 16' Bambi. There were fewer than 850 built from 1961
; most of those in the Ohio plant, about a third in the CA plant. They come in two flavors, the curbside kitchen and the streetside kitchen. I believe that the Ohio Bambis were built with the curbside kitchen and the CA Bambis had the streetside kitchen. (I had a '61, and I remember reading this stuff somewhere, probably something from the Vintage Club membership). In any event, because of their low production numbers and their 'cute' value, they have gotten to be pretty unreasonably priced for one in useable condition. In 1964
the Bambi was lengthened to 17' and called the Bambi II. The Bambi II was re-badged for 1965
as the Caravel
and the '65-68 models were all pretty similar with few production changes. by 1969 the Caravel
grew to 18' and was produced until (I believe) 1970 or '71 (I'm not sure...).
Over the years, Airstream has built a number of models 23' and under though, most notably the Safaris, Flying Clouds, Globetrotters and Caravels that are priced well below the Bambi today.
Of course, as Stef said, there are lots of new and exciting offerings from Airstream today too.
Check around, peruse the resources here and elsewhere on the web, and happy hunting!