This study analyzes body positive, a movement challenging women's beauty standards to promote acceptance of the body as a whole, and the relationship with the theory of social comparison, which indicates that people are continually comparing themselves with similar ones, upward or downward. A qualitative methodology was adopted based on semi-structured interviews of 20 female university students between 18 and 24 years to analyze different Instagram posts of the Sicurezza underwear brand. It is concluded that a type of upward social comparison predominates, both positive and negative, depending on the type of digital images to which they are exposed. There is also a good acceptance of body positive, since respondents feel more identified with the most diverse body types depicted by Sicurezza in their digital communication on Instagram and their body satisfaction and self-acceptance increase, besides encourages them to feel comfortable with their bodies and what they use.