This is a scale model of the huge Boeing 777X the longest airliner in the world.
 
The model is a 1 to 200 scale, is a easy to print model that need just a bit of supports structure for some parts. Is designed to be printed on a standard 3D printing using a 0.4 nozzle, although if you use a smaller nozzle will be even better, specially for the landing gear.
 
UPDATE 07/12/2017: There is a fuselaje version with the windows recessed for easier painting.