I agree, she looks like she should be able to handle a fuzzy. It's always hard to tell scale though with these kinds of photos. Some breeders do keep their snakes on a maintenance diet, so it doesn't surprise me too much that it looks like she's undersized.
Perhaps for the first meal you should feed her a smaller sized meal anyway.. just so it won't be intimidating and you have a positive first feeding experience. You can also see how large the bump is. If she has no bump after eating a pinkie, I'd just go ahead and offer her a fuzzy on your next try.
Good luck with her, she is beautiful. Even with all those crazy morphs out there, a nice Okeetee is just a knock out amazing animal.