Google image search gives some returns on that particular image to this past summer. Does that mean we're looking at an actual photo of JL-3? One would imagine if it was a French or Russian missile that there'd be more hits on google for it.
Anyway, IF we're indeed looking at jl-3 and IF this is indeed an image of JL-2,
then i find it peculiar that the design went back to a more pointy nose.
As opposed to french m45 going from a similar pointy nose to a more blunt nose in m51. Or Poseidon to Trident nose change. Russian Bulava missile also has a similarly pointy nose.
Other details are very hard to estimate as the resolution is poor. Length to diameter ratio appears to be just a smidgeon under 6, give or take 10%. Which could be too much error in this case. 1.8m diameter would yield 10.8 m long missile. 2.1m diameter would yield 12.6 m long missile. But given the possible error margin, it might very well also be anywhere from a 10m to almost 14 m long missile.