COMING SOON: MORE SIZES!
You've asked for it and you'll get it, more sizing options are coming soon to Cyberbike's line-up.
The Frisco and Mullet are currently only available in one size each, with the Frisco a "Large" and the Mullet "XL" with respect to step-over height. For 30" inseam and up, basically, but those coming from a motocross or similar background will likely be more comfortable with the ride height.
Please see the respective specifications on each product page for further measurement details.