Body image is both external (how society views body image) and internal (how we personally see our body). It's important to separate what the media portrays as the ideal body image and what you mentally think about your own body. The media perfects images that are unrealistic and unattainable, which ultimately can make us question our own bodies and possibly feel unhappy about our own self - worth.
What's important if you are feeling this way is to redirect any feelings of negative self - doubt and work on loving your unique body. Replacing any negative thoughts with positive affirmations. Saying these positive affirmations out loud to yourself when you want to criticize yourself is a great start towards self- love.
Finally, it's important for all of us to understand that our size nor shape is what defines our success, intelligence, or character we are far more than the external picture.