Depends. It's all relative to your body type, and in a lot of respects it's about illusion. Some people (like myself and Alex23) have shoulders and torsos disproportionately bigger than our arms, meaning that even a 20"+ arms looks "smaller" on that kind of frame than it would on somebody who has a bird chest.
yeah i have a similar blocky build to what you describe
broad, strong torso, wide waist and stocky legs, but small arms 'in comparison' (they are still small though keke)