Of that expansion

The basic process of inflation consists of three steps:

• Prior to the expansion period, the inflaton field was at a higher-energy state.
• Random quantum fluctuations triggered a phase transition whereby the inflaton field released its potential energy as matter and radiation as it settled to its lowest-energy state.
• This action generated a repulsive force that drove the portion of the universe that is observable to us today to expand from approximately 10⁻⁵⁰ metres in radius at 10⁻³⁵ seconds to almost 1 metre in radius at 10⁻³⁴ seconds.

They right sized the yardstick! Back to this thing later.