What is the smallest manned jet aircraft? In the movie Spy Kids (2001), there is a scene where the characters board a small jet aircraft "built for one passenger". The aircraft is about 2 meters tall with a 3 meters wingspan, and features a single jet engine, air intake located below the canopy, and tricycle landing gear.



Which got me wondering: what is the smallest fixed-wing jet-powered aircraft to date?

Some clarifications:


The aircraft must be able to takeoff and land under its own power (i.e. aircraft launched mid-air does not count).
The aircraft is propelled by one or more turbojet or turbofan engine(s) (i.e. no propellers, no rockets).
"Smallest" is measured by wing span.
The aircraft must be pilot operated (i.e. RC aircraft does not count).
This is not a question about whether an aircraft that small is possible, since there is already another very similar question. Rather, this question is about the smallest aircraft successfully flown in history to date.
The BD-5J is what guinness world records claims to be the smallest but it is larger than the Cri-Cri in its jet implementation (the BD-5A is smaller than the Cri-Cri but prop powered)  

If you want to count really experimental stuff the Martin Marietta X-24A lifting body has a wingspan of only 11 ft 6in. making it the smallest. Although I will admit it is predicated on a lose definition of "wing" and is rocket (not jet) powered.     

Although if you broaden your definition of "aircraft" Yves Rossy's jet wing backpack is the smallest coming in at a wingspan of 7.9 ft. It is still piloted, jet powered although I do not think it can take off under its own power.