OK, just got one out of the bag (in my size....) and checked the ponytail opening (oh yeah, and I tried it on, too... Yummy soft feel. )

The opening is horizontal, located in the center of the back of the hood. It measured 2.75 inches across.

Hope this helps.

Incidentally, I definitely do not check the forums everyday, and even when I do log on, I usually only have time to just skim a few sections. I really want to make sure you all get your questions answered, so if there's anything you just gotta have an answer to, or have a time-sensitive issue, shoot an email to custserv@teamestrogen.com, and you'll get a speedy reponse. You can also send me a PM, but I'll make the same caveat - I'm not on here everyday, and I don't want you to think I'm ignoring you.

Susan