On closeup it definitely seems to have some sort of payload hanging from it, and its getting knocked around by the wind quite a bit, It doesn't appear to be falling though, just drifting west
I don't think it's a skydiver, it doesn't look canopy shaped, it looks balloon shaped. Also it didn't fall, it just drifted. Besides, skydivers famously try to avoid international airports
It's hard to say how big it is, or how high. Weather balloons can be huge, and flying at 12km+ altitude it can look like a much smaller balloon flying much lower.