How Long Does First Period Usually Last After Done Breastfeeding?

I quit breastfeeding, and I now have my first period since after I had the baby. This is my 8th day of my period. Before, my average period would last 6-7 days.

When Do Women Who Are Not Breastfeeding Usually Start Their Periods Again?

I know everyone is different, but what is the AVERAGE time frame when a non-breastfeeding woman will start her period after giving birth?