DHB has different series of clothes with different fit.

These are the measurements of Aeron jersey, size M:
- armpit to the bottom of the back: 42 cm
- the chest (armpit to armpit): 40 cm
- length of the zipper: 53 cm
- length of the zipper (excluding the collar): 48.5 cm

These are the measurements of Aeron Speed jersey, size M:
- armpit to the bottom of the back: 42 cm
- the chest (armpit to armpit): 36 cm
- length of the zipper: 51 cm
- length of the zipper (excluding the collar): 48 cm

Both of them fit me perfectly, I don't find them short. I'm 181 cm (5' 11") and 73 kg (162 lb). Aeron Speed is more snug fit than regular Aeron (but fabric is more stretchy). Also, what may be very important for you, DHB bibs and shorts have different leg length in different series - regular DHB bibs quite short, Aeron longer, Aeron Speed - even longer, nearly reaching my knees.

BTW, at your 5’ 7” and 149 lb you'll probably need size S to get a good fit length wise. And if, say, Aeron Speed may be too tight at S for you (though I personally don't think so), regular Aeron will be a more relaxed fit, Classic or Flashlight series even more relaxed.