The school uniform consists of a South Bronx International Middle School uniform shirt. This can be a polo, an official SBI T-Shirt, or a sweatshirt. Students must wear khaki pants OR school sweatpants only. Sneakers are required. Shorts, hats, hoodies, crocs, slippers, and flip flops are not allowed.

Students who are consistently out of uniform are subject to disciplinary action. Families may be required to attend an in-person meeting to discuss uniform policies.