Today I read a post stating that reports stated JonBenét's vagina was "much larger for a little six-year-old girl". Where does that come from?

The pertinent parts of the autopsy follows:

Inside the vestibule of the vagina and along the distal vaginal wall is reddish hyperemia. This hyperemia is circumferential and perhaps more noticeable on the right side and posteriorly. The hyperemia also appears to extend just inside the vaginal orifice. A 1 cm red-purple area of abrasion is located on the right posterolateral area of the 1 X 1 cm hymeneal orifice. The hymen itself is represented by a rim of mucosal tissue extending clockwise between the 2 and 10:00 positions. The area of abrasion is present at approximately the 7:00 position and appears to involve the hymen and distal right lateral vaginal wall and possibly the area anterior to the hymen. .... No recent or remote anal or other perineal trauma is identified.

Genitalia: The upper portions of the vaginal vault contain no abnormalities. The prepubescent uterus measures 3 X 1 X 0.8 cm and is unremarkable. The cervical os contains no abnormalities. Both fallopian tubes and ovaries are prepubescent and unremarkable by gross examination.