UG has the sq footage for all WDW resort/villas posted in their book & layouts, helped us decide where to purchase (unseen lol)
if i'm not mistaken, the BWV is one of the biggest studios ; at least it seemed more spacious than WLV (might be because it's decorated dark/earth tones?) or BCV to me
You can view 360-degree tours of every studio at www.disneyvacationclub.com. Select a resort and click on the link to the 360-degree tour. When that window loads, select "studio" from the list.
ETA: The AKV studio tour on that website is the Kidani studio, not the one in Jambo House.