The wingspan is based I believe on the A330.
i had an interesting flight last week with Atlantic Airways to Vágar Airport in the Faroe Islands. Although the airline has only 4 A320 jets they have devised with Airbus a unique landing aid which allows them to land at Vagar with a minimum cloud base of only 200 feet. Because of the very severe weather conditions in the Faroe Islands and quite a short runway, this piece of kit is essential as I experienced last week.