I almost want to describe this as a very "well-tailored casual" look but to call it tailored doesn't seem right. It is not tailored but just "well-proportioned" or "well-fitted"
The jacket length is good, the sleeve lengths are good (if not a little fashion-forward) and the jeans are slim but not tight.
So often we call casual is actually just sloppy.
This takes "casual" to higher level.
[Source: The Sartorialist]