127 film is expected to be available again later in 2022
In many way 127 film is ideal. The film is 46mm wide and the image is 40mm wide. Depending on the camera, it makes negatives that are 40x30 (the so-called 'semi' format, 16 images per roll), 12 images 40x40mm, or 8 images 40x60mm. The frame is large enough to make excellent enlarged prints. Yet the roll of film is so small that cameras can be compact, even pocket-sized.
In fact, the camera picture here, a Foth Derby (shown with long-discontinued Macochrome slide film) is smaller than any 35mm SLR, yet the image is 40x60mm rather than 24x36mm.
127 film was, it may be argued, the amateur photographer's favorite film from the mid-1910s until the early 1950s when color photography using 35mm Kodachrome became popular.
It was inexpensive and versatile, and dozens of inexpensive and versatile "vest pocket" or "candid" or "baby" cameras were available. A truly frugal photographer could use a modest camera, order contact prints, rather than enlargements, and be satisfied with the size of the images (1-1/2 inches square, or 1-1/2 x 2-1/3 inches). Someone willing to spend more, and willing to use a camera with a professional-quality lens, could enjoy enlargements of fully professional quality and still benefit from having a small, easily-carried camera.
Three excellent small twin-lens reflex cameras for 127 film, from the late 1950s, with superb lenses and shutters: Baby Rolleiflex, Yashica 44, and Primo-Jr.