Even before we reached the decision to buy, our Guide discussed the capacity a studio, 1BR, 2BR, and Grand Villa at The Disney Vacation Club (as OKW was called back in 1994).
Then, over the phone, our Guide went over a Product Understanding Checklist (or some such name) that, among other things, clearly spelled out the capacity of each type of accomodcation. We also had to initial each item on that sheet as part of the transaction paperwork that was sent to us.
It was very clear to us. As a family of four, we could stay in any size unit. But we bought so we could stay in spacious 2BR, 2BA condos. The only time we've booked a 1BR has been when it's only my wife and I.