All of the aforementioned videos suck compared to this one from the legendary HotKinkyJo. She can take a LOT more depth and width, and she's better-looking than Diamond Kitty, Vinam, or any of the others.
Two Anal Girls dildo workout - xHamster.com
Here, you can see an imprint of a fist in her belly.
Hotkinkyjo belly bulge double anal fisting prolapse lick - xHamster.com
Here, she takes more than half an arm.
40cm ELBOW DEEP ANAL FISTING Donna Hotkinkyjo Kinkynikky - xHamster.com
I have also seen her taking the 18-inch, thick Rambone dildo to the balls. She is simply the best female anal performer in the business right now. I literally have a collection of thousands of this type of video. It's my fetish.