Iris size

[Avidria]

Large on fem Au Ra, large or small on fem Miqo'te depending on the overall look I end up going for, and small on Viera and Miqo boys.

[Chie_M]

Large! For all races, all the time.

[einschwartz]

I've played around with other races, and it seems I prefer small iris every time.

[Allegor]

large on Roe and Viera, small on Hroth

[MomomiMomi]

You WILL look into my soulless eyes!

[SugarPuff]

To me it looks like the difference actually applies either to the pupil or iris depending on the race so it varies. I used small for my miqote and lalafell but large for my elezen.

[Limonia]

It depends on the race and face.
I think I have the small iris on my female Au Ra. I just use the one I like more, depending on the other options.

[NessaWyvern]

I tend to use large irises for female characters, and small for male characters. I think it might be a symptom of watching cartoons where the female characters typically have larger eyes, compared to male characters.

[Canada_bangs]

Large.. I picked small and it makes the character look crazy. Try doing that on a midlander and you'll see what I mean. So large all the way.

[xxvaynxx]

Large.
I feel the small iris give people psycho looks, mainly the females. Looks fine on guys.