KL Geisha gore is sort of lopsided and odd (not a photographic issue, it's really that uneven!), but the measurement at the bottom of the gore = 1.5" (or just under 1.5"). [I'm taking this measurement for all my bras now. I'm doing it consistently at the point where the upper edge of the elastic meets the inner edge of the wire channel, straight across to the same point on the other side.]
