The uniform, consisting of a dark blue coat and breeches for boys and dark blue jacket and skirt for girls in the summer term has an extremely strong effect on how the school is perceived by anyone who looks at the students of Christ’s Hospital. At first glance, you might say they look like vicars or Hogwarts students, but a closer look at the uniform will be sure to tell you the significance behind it.

For 460 years, the uniform has remained unchanged. In the early days, school gathered funding from the generous citizens of London for new clothes to be provided for students. Christ's Hospital provided ‘poor and fatherless’ children with shelter and an excellent education which wouldn’t have been possible without the help of King Edward VI, the founder, who has been immortalised in the silver buttons worn on the coat. The blue and yellow dyes were inexpensive and brightly coloured, chosen specifically to help identify the children of Christ’s Hospital and differentiate them from the ones from surrounding schools, it was also in accordance with the Tudor style. The ‘broadie’ is a metal buckle pupils receive when they have reached year nine (Little Erasmus) and the next year following on in year ten (Upper Fourth), girls go from wearing yellow socks to wearing black tights, signalling the start of their senior years. If a family member or friend went to Christ's Hospital before, the buckle can be passed down through the generations. Oftentimes, a long string of buckles can indicate a long-time connection to the school.

Although the uniform might be unusual in this age of fast changing fashions, it is a well known symbol of the history of Christ's Hospital School and is unique to only students of Christ’s Hospital.