I measure the length of my longest dildo, then insert it as far into my pussy as I can. Then I measure how much of it fit into my pussy. I repeat this a total of three times, trying to get a little deeper each time.
I've watched a few pussy measuring videos (for science) and I think 6-7 inches should be the average for white girls' pussies. So you don't have a 'big pussy', it's just average.
