  Magnetic skyrmions are nanoscale spin textures touted as next-generation
computing elements. When subjected to lateral currents, skyrmions move at
considerable speeds. Their topological charge results in an additional
transverse deflection known as the skyrmion Hall effect (SkHE). While
promising, their dynamic phenomenology with current, skyrmion size, geometric
effects and disorder remain to be established. Here we report on the ensemble
dynamics of individual skyrmions forming dense arrays in Pt/Co/MgO wires by
examining over 20,000 instances of motion across currents and fields. The
skyrmion speed reaches 24 m/s in the plastic flow regime and is surprisingly
robust to positional and size variations. Meanwhile, the SkHE saturates at
$\sim 22^\circ$, is substantially reshaped by the wire edge, and crucially
increases weakly with skyrmion size. Particle model simulations suggest that
the SkHE size dependence - contrary to analytical predictions - arises from the
interplay of intrinsic and pinning-driven effects. These results establish a
robust framework to harness SkHE and achieve high-throughput skyrmion motion in
wire devices.
