We wear the traditional white uniform only. Generally advertised as a karate "gi" these typically come in sizes from 0 - 7 and in different weights and materials. We do not use the V-neck or "pull over" style. Ask your instructor for advice about purchasing uniforms.
While a uniform with front patch is required, the school back patch and pair of U.S. and Korean flags is optional. (See below for patch placement.)
Here is a diagram that shows how to tie a belt.