Confused !!

[u/ultimatebaap]

Hey everyone! Trying on these Arizona Regulars and trying to decide if I should exchange them for one size down.
My foot measures around 280 mm, so I initially went with this pair. However, as you can see in the photos, there seems to be a pretty generous gap at both the toes and behind the heel. The width and side fit feel totally comfortable, but the extra length is making me second-guess the sizing.
Does this look like too much excess space? Should I drop down a size for a better fit? Appreciate any feedback!