Being totally naive about these thing, what defines a "Footy Yacht" ?
Found some rules
http://footy.rcsailing.net/rules.phpThe hull could be a tad over a foot.
Taken from the link above.
PRIMARY MEASUREMENT RULE
B.1 With the exceptions listed below in B.2, B.3 and B.4, the boat in racing trim shall be capable of fitting into an open-topped rectangular measurement box of internal dimensions 305mm long, 305mm deep, 153mm wide, with 6.3mm wide slots for projecting spars and rudder, as shown in the diagram.
B.2 The following may project above the top of the measurement box: sail(s), mast, spars, rigging, aerial, associated fittings.
B.3 A bowsprit may project forward of the measurement box.
B.4 The following may project aft of the measurement box: bumpkin, rudder.