It's funny how a watch can look a completely different size than it actually is.
For example, the first manual Carreras seem tiny against the automatics, but I measured an example of each case type when I was working on the Carrera table and what your eyes see isn't always borne out by the tale of the tape:
2447 H 43mm, W 38mm, D 10mm
3147 H 43mm, W 38mm, D 11mm
1153 H 44mm, W 37mm, D 12mm
110.573 H 43mm, W 38mm, D 14mm
371.253 H 44mm, W 37mm, D 8mm
510.511 H 44mm, W 37mm, D 13mm
All measured just with a tape so not as accurate as you'd get with a micrometer, but all done by me using the same tape! So the major dimensions of the Carrera were actually fairly static across its lifetime, the biggest change was in depth to accommodate different movements. But you'd never think it to look at them...
