Correct foot position in mountain pose

A question for more experienced yogis out there: How is the correct foot position in mountain pose? Feet and toes touching or feet apart in hip distance?

Maybe there is no right or wrong and this is a matter of taste or the two foot positions have different purposes?

I noticed Aly mostly instructs to put the feet together. For me that is slightly uncomfortable because the bones in my knees push towards each other and maybe also because my thighs are rather big.

Would be happy if I can educate myself a bit on this detail :)