I'm bot vers and have had dicks of all different shapes and sizes. I can take a pretty large cock if the need arises however I am by no means a "size queen". For me I care more about hygiene and how it's used. As long as it is long enough to get the head in it's good enough for sex, and this length is variable and very much bottom dependant. A slim bot who is very flexible wont need as much penetration length on a dick compared to a bot who has a bountiful trunk. Thickness will also depend on how much that bots hole has been worked. Personally mine tends to shrink back pretty nicely so even a dick on the thinner side can feel good. And if it can't penetrate a butt then there is always oral play!

Also one of the most pleasurable dicks I have ever experienced would have only been about 4 inchs erect maybe less… had a nice average sized head on it and felt like I was being fucked with a prostate stim. Was amazing full hands free cum whilst being fucked which has only happened a couple of times in my life. A little dick is perfect to bang that prostate as long as it is used correctly.