Rickochet depends on size. they do publish there specs so it's easy to navigate:
They start at a typical jumbo (standard +1/8) and go bigger from there to X-large + 3/8. You are correct they are quite big the further up the size chart you go, but the standard should be in line with the Win jumbo! Love the feeling of these on driver (medium or large for me...tried XL and it was too big under the left hand) and the Ultralite (standard and reduced/no taper) and Zen lite are fabulous options. The original were just way too heavy and completely changed the feel of the club. The Ultralite is just firm enough and the Zen lite is firm if one does not like the approaching Winn squishy feel.
They also make charts to compare the sizes.in inches at the butt and midsection of the grip....pretty handy IMO.
