I thought it would be a nice idea to work out a list of size comparisons using the floor area of vans as a guide. These aren't totally exact as vans have curved bits but I've multiplied the internal length by the internal width. I haven't got Puck or Puck L dimensions handy so apologies for not listing them.
Eriba 3XX - 7m2
Swift Basecamp 2 - 7.2m2
Swift Sprite Compact - 7.8m2
Eriba 4XX - 8m2
Bailey Discovery D4-2 - 8.7m2
Eriba 5XX (pre 2010) - 8.9m2
Eriba 5XX (current) - 9.3m2
Bailey Phoenix 420 - 10m2
Swift Sprite Alpine 2 - 10.2m2
Eriba 6XX - 10.7m2
Swift Challenger 480 - 11.6m2
Hymer Nova GL 470 - 13.2m2
Apart from some of the Eribas, these are all 2 berth vans.