With all due respect, unless if you have had plenty (and I do mean plenty, as in raining women) of women on your bed and took a good look at their parts nearly every time ( not just usual glance before oral ) that is not quite a good measurement ruler.
There is a lot of variety down there. I believe you could try and find websites that show cisvulvas outside of a sexual context. I'm not saying you don't know what they are like, I am just saying "normal" is a broad spectum. About transgender ones, I began by looking at surgeon's websites, many of them have a "sample gallery". Suporn has a few examples, Kamol too, PAI CLINIC too, Bowers, Mcginn, etc.
I'm also a physician (GP). Although I don't see as many vulvas as a gyn would,I do see quite a bunch and fairly often. Before I enrolled in university I had a different view of what normal female and male anatomy should be like, but it changed simply due to exposure.