It's no secret one can go deeper analy than any other hole. How deep have you gone? If you have a goal and haven't reached it yet, post what your goal is and how much you're taken so far.
I only use slender toys anally. I have a very soft, gummy, 1/2 inch anal probe that is exactly 1 foot long, to the "T" handle. My hubby had it in my tush one day and it was very comfortable. After a few minutes he said "do you realize this thing is ALL the way in"??? I was surprised, but it was completely comfortable. Had a great orgasm too, with his vaginal penetration and some clit play. Thus I know exactly how long my "longest" was...one foot, 12 inches. Just remeasured it. Twelve inches exactly.
I saw a video where one guy was being penetrated and his partner pulled out, dipped into him and pulled out a monster double dildo. I always liked going as deep as I could before that but after it, I became fixated on it. I had an 18" double dildo nd I tried to get it all the way in, I managed all but the last inch. It was very exciting but I was so stufffed. The sensation was almost too much to bare.
I never measured. This guy I was seeing was huge and long and he fit really good in my butt in a way that gave me super intense O's. He used some large toys that we picked out and I know the biggest one of those was even bigger around than him and alot longer and I had most of it in me a few different times. Had to go slow and take deep breathes. It made me crampy after though.
I can get maybe 5 inches in at most, but the toy I use is really girthy (1.75"). I kind of want to get one of those really flexible double ended dildos since I'm sort of fascinated with people being able to take in all of that length...