BirkenstockUnisex Arizona Birko-Flor Sandals

Has anyone gotten blisters from these?

Are these a grey color? The description says black but they came up in my search for grey.

I received mine today and they feel a little tight on my feet, will these stretch a bit ?

Friend has black ones so i got black too. hers are year old & seem softer/ wider? new ones are higher & harder. new version or r hers aged? both 40.