Casula Retro is a typeface without serifs (without endings) that has a classic or retro style or aesthetic. These fonts often incorporate design elements inspired by a particular era, such as the 1950s or 1960s, but can also include styles from other periods in typographic history. A harmonious mix: Typically, retro sans serif fonts have a harmonious mix. harmony between the horizontal and vertical parts of the letters, producing a balanced and easy-to-read impression.