"As I began creating my second signature shoe with Puma, I knew I wanted to name it after my daughter Ruby.  Not only to symbolize the incredible bond I share with my daughter, but also to pay homage to the unwavering strength and resilience of mothers everywhere" Stewart said in a statement.

"Being a mother inspires me to be the best version of myself everyday and I hope wearing the Ruby colorway empowers others to recognize the limitless abilities and spirit within themselves."

The shoe size is 12.5.