I'm curious as well and plan on sleeving my 'nice linen' cards immediately upon unboxing. I posted a comment on the KS page and hopefully someone who has possession of the game will actually post the card measurements.
Are you all having any problems fitting the sleeved cards back into the box? I assume you might have thrown out the insert? I haven't picked up my sleeve packs yet, but it looks like it's going to be tight.