I had a Tuna SBBN017 and there is no doubt it is a chunky watch, but didn't feel ridiculous.
However, it got flipped and now I have a 7549 7010 Tuna, which is only a smidge smaller than the 017 but wears just right. It's still a chunk but slightly thinner.
Obviously the Tuna has no lugs which helps massively.
But I always thought a Seiko SPB077 would be way too big at 44mm by 50mm. Seems I was wrong …
And I can also happily wear a 36mm Explorer
Where it gets silly is anything over 40mm with no bezel. I had an LLD and just loved that watch, but it was wrong on my wrist with a 52mm lug to lug.
Then there was an AT Railmaster 41mm …
No, just NO!
Generally, the sweet spot for me is 38mm, but dimensions are deceptive.