To the OP:
This is really weird for me to talk about now, but once upon a time when I was still working through wondering if I was 'man-enough' for the world I put a lot of time and effort into researching what was normal for penis size. Your measurement is totally normal compared to what is most common in the world's population. This should also present no significant challenge to a GRS surgeon. My own size (from when I still cared to measure and mistakenly believed that an erection was sexually necessary for me) may be longer than yours but it means nothing more to me. I'm sure you'll have plenty enough skin to work with. Keep in mind that if you are also physically small in the pelvis area then your depth limit via surgery may actually be available space within the body cavity.
Just to add my own take on how I feel about my body sexually, since others have done so already here, I would like a relationship with a woman and would not need major depth. That said I would want to feel normal for a woman and would want to be able to receive penetrative sex from another woman without any complications. While the prostate taking on the role of Skene's Gland (g-spot) will be located at a rather shallow point within the neo-vagina, a little overshoot for thrusting would be sensible. I have no way to know in advance of surgery how I will best sexually respond to a partner's actions but I would like to leave all my options open. I would at least have the benefit of a partner being able to select and tailor their size to my needs seeing as a cis female partner would be using artificial means to penetrate. It is rather nice that this allows significant freedom in finding a compatible life-mate because it is not so dependent on the anatomy of the person. This is particularly useful given the 'less pliable' nature of the neo-vagina versus a cis one.
