Ultrasone HFI ear cups size smaller than the pro900?

I have a pair of Ultrasone pro900 for home use.

I would like to get a headphone for travel.

I have used the pro900 for travel in the past and they are a tad too big and heavy.

I would like to stick with Ultrasone.

I am curious if the HFI 780, 680, or 580's would provide a more lightweight, smaller solution.

Thanks