With the magic of the interwebs, it didn't take Fujirumors long to find mock ups of the new lenses. @AndyH44 it looks like my guestimation is pretty close on the size.
FIRST IMAGES of FUJINON XF 16-80mm F4 and XF 16mm F2.8 - Fuji Rumors
FIRST IMAGES of FUJINON XF 16-80mm F4 and XF 16mm F2.8 - Fuji Rumors