If you're 7 3/4 and up, I wouldn't order the strapback from Ebbets. I emailed them and they said it fits like a 7 5/8 at its biggest adjustment. I got a 7 7/8 fitted one and it's great. They are pretty expensive in Canada with conversion and shipping, but they run good sales if you keep an eye out - you can get 40 or 50% off if you're patient, and then they're a little more reasonable.
I vouch for them as a really high quality hat, and it's nice that they're made in USA. Definitely worth paying a little extra for, especially if you need a huge size. They were purchased by Lids recently though, so hard to say how long all of the good stuff will remain true.