What are the criteria of classification of chromosomes?

According to banding patterns (uniqueness of each chromosome structurally and functionally) lengths, shape, position of centromere, which gives arm ratios=p/p+q (p=length of petit arm and q=length of long arm (letter after p) (Metacentric- p/p+q=1/2 both arms of both strands are equal) (submetacentric- p/p+q<1/2 short p arm and longer q arm) (acrocentric p/p+q<<<1/2 very short p and long q) (telocentric p/p+q=0 No p arm)