Growler its far larger than PAK FA
The Chinease fighter is 70 ft long its a beast in size
in this picture the PAK FA looks smaller than Flankers
Sukhoi T-50 PAK FA | Flickr - Photo Sharing!
70 ft (21 meters) is just a rough estimate from looking at photos so there is going to be a large margine of error.
According to Wikipedia:
A flanker is 73 ft (22 meters).
PAK-FA is 66 ft (20 meters).
Raptor is 62 ft (19 meters).
So even if it is 70 ft (21 meters) long, that's still a reasonable size for a twin engine long range heavy fighter.