I can give you some rough figures for that:

The CMBR was emitted 13.7 billion years ago.
The particles that emitted the radiation were 40 million light years away.
The photons travelled 13.7 billion light years to get here.
The particles are now 46 billion light years away.
The CMBR was emitted at 380,000 years, redshift z=1100 (some one can probably tell us the recessional velocity for z=1100).
Expansion exceeds c at high enough redshift. (I don't know the figure.)

I think if you travel close to c your mass appears to increase to an observer (thats true at least for time and length, which seem normal to you but shorter and slower to an observer).

When my wife flies on the Enterprise I'm always careful when she texts "does my bum look big in this?"

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If something is in me which can be called religious then it is the unbounded admiration for the structure of the world so far as our science can reveal it... of the manifestations of the profoundest reason and the most radiant beauty, which are only accessible to our reason in their most elementary forms...
Albert Einstein