There may be a limit on matter, but there is no limit on space.

You will never run out of space to accomodate matter.

I have no trouble conceptualizing infinite space. People get all hung up on the notion that space must expand to accomodate expanding matter. Space doesn't give a damn about matter. Space is virtually infinitely larger in volume than matter.

To put a limit on space is putting thought on a Mobius strip.