The shape is exactly a Draken though. Not similar, but equal. Google images of the Draken, there's no other possible match. I think in this case the size estimates must be wrong.
Given the low resolution and thus lack of detail, it's as close to an F16 Cranked Arrow shape as it is to a Draken IMO... And the size of an F-16 and Draken are very similar, so if the size estimates are wrong, it could as easily be an F-16 XL...