I don't suppose that anyone would happen to know the actual dimensions on the bins, would they?

My usual rollerboard is too long and I ALWAYS feel pangs of guilt being a bin hog when I've got to go wide with it; Christmas is a good opportunity to get somebody to get me something with which I can downsize, but as I'm doing most flying now with WN instead of UA I don't want to get something that is fine for the wrong carrier and aircraft type.

Thanks,
Scott