I think it is quite rare for women to have fetishes at all (kinks are fairly common, but fetishes like foot fetish, latex fetish, etc are not), and most women I know prefer average penises- big hurts.
Women into cuckold fetish are those most stereotypically into men with big dicks, but the logic behind that seems to usually be more about humiliating their cuck than enjoying large dick.
I think it's mostly straight men who have obsessions with women who like large dicks, so porn is produced with women being penetrated with giant dildos or porn-huge penises, but it's more of a men-like-women-who-like-big-cocks thing than women actually liking that.
That isn't to say there are no women with large penis fetishes, just that it's really rare.