 These varieties have existed since the 1960s but sold poorly due to the lock-step mentality of the education system that gradually began changing in the early 2000s.The increased variety of colors is partly as a compromise for parents to retain some tradition within modernized schools which no longer require the use of traditional uniforms or the "randoseru".A typical "randoseru" measures roughly 30 cm high by 23 cm wide by 18 cm deep, and features a softer grade of leather or other material on those surfaces which touch the body.