I am normally a medium (size 8/10 pants) in my running pants and really needed a new pair to use throughout my pregnancy since mine were getting tight. These stretched along with me until the day I delivered. I ran until 7 months pregnant, then walked in these. I looked far and wide for maternity running pants, but they were so expensive for just a short amount of time. These were perfect and the best price ever! So happy, especially since I bought from only seeing them online.