Schools in my area had a dress code, and my school almost succeeded at requiring a select jacket model as a must (done by a single local company connected to a school admin, wink-wink), but faced backlash over poor price/quality balance 🙃

One of the unusual upsides, many men well in their 20s, who otherwise couldn’t be bothered, had their high school formal suits to wear on future funerals and weddings. I was one of them and that was handy.

If the uniform should be there, to ensure it’s not hostile, it may be:

1. Of basic rules. Formal dresses, dark under the waist line, white over it.
2. Civilian models, without a glimpse of cop/military details and ranks, insignias.
3. Common to everyone without any color differentiation (and requirements to buy it in exact shade of a color).
4. Rather cheap or even subsidized, shared from older to younger kids, because children are frequently growing out of them and it’s a bummer to buy ten+ sets of dresses.
5. Purposely unisex and non-sexualized models.