US toy manufacturer Mattel unveiled a new Barbie doll Tuesday representing a person with Down syndrome, as it seeks to allow more children to see themselves in the popular figure.

The toy was brought to market through work with the National Down Syndrome Society (NDSS), to ensure it accurately represents someone with the condition, the company said.

"Barbie plays an important role in a child's early experiences, and we are dedicated to doing our part to counter social stigma through play," said Lisa McKnight, executive vice president and global head of Barbie and dolls at Mattel.

The new doll has a face and body sculpt aimed at being "more illustrative of women with Down syndrome, including a shorter frame and a longer torso," said Mattel.

Meanwhile, the doll's dress pattern includes butterflies along with yellow and blue colours - symbols associated with Down syndrome awareness.

Click 'read more' to find out more about the new Barbie doll.