42mm (and a battery) for the win. Easily always in my top three of the entire collection. With obvious heavy influence from the submariner, this 844-derived diver line saved the entire brand for Jack Heuer in the early 80s and became the basis for its smashing success as Tag in the 90s. Was it the Invicta/Steinhart sub copycat of its day? Kinda. Do I love it today regardless? Absolutely.
Another great take on this ref in particular: https://heuerville.wordpress.com/2011/09/09/heuer-diver-980-006l/
Yep 42mm. 7.5” wrist. Definitely less bulky - this reference in particular is especially thin.