This is the accepted manuscript made available via CHORUS. The article has been published as: Inertia and Chiral Edge Modes of a Skyrmion Magnetic Bubble Imam Makhfudz, Benjamin Krüger, and Oleg Tchernyshyov Phys. Rev. Lett. 109, 217201 — Published 20 November 2012 DOI: 10.1103/PhysRevLett.109.217201