7 - 17 - 27
The first signs of dysphoria came around age 7, but I didn't realize then. I have pretty feminine pictures from age 1 month to 3,5 years at least.
First conscious announcements were at age 17. I remember opening the front door in girls clothes without any second thoughts. I just felt that whoever was on the other side I was being *real* and they just had to come to terms with it.
At that time I also told my high school class that I felt I belonged in a womens-only school.
There have been some half-conscious announcements prior to that though.
Twenty seven was the time I started full time transition. Finally going to that all-girls school I dreamed of for so long
Prior to that I never succeeded in doing actual feminine presentation, because of lack of support and information.
Good luck