Lancia Delta Headlamp Size

Hi Delta owners -

I came across ads on eBay for Lancia Delta headlamps.

http://www.ebay.co.uk/itm/Lancia-Del...item4ab66d6dd4

They look -- from the pictures -- to be a "standard" size for round headlamps.

What I would like to do is to purchase a set, and retrofit them on my Alfa GTV6 (with the understanding some fitting will have to be done to the mounts on the Alfa). The question is, what is the diameter of the Lancia Delta headlamps, for each, or both the main beam and the high beam lenses?

Thanks in advance!