Mexico City’s Mayor Claudia Sheinbaum announced on June 3 that children in Mexico City would be allowed to choose the uniform they wear to school. The policy applies to pre-schools, elementary schools, and secondary schools. Sheinbaum called “the era in which girls had to wear a skirt and boys had to wear trousers a thing of the past.” She added: “Boys can wear a skirt if they want to and girls can wear trousers if they want.” She called the measure “very simple … but important.” She is right. Allowing students to choose their attire can help combat gender stereotypes. Among those who will likely benefit most from Mexico City’s new policy are gender-nonconforming children. They may include lesbian, gay, bisexual, and transgender (LGBT) youth, whose gender expression does not always accord with rigid norms.