Use Pearson's r and Spearman's rho to assess the association between two variables that have ordinal categories. Ordinal categories have a natural order, such as small, medium, and large.
The coefficient can range in value from -1 to +1. The larger the absolute value of the coefficient, the stronger the relationship between the variables. An absolute value of 1 indicates a perfect relationship, and a value of zero indicates the absence of an ordinal relationship. Whether an intermediate value is interpreted as a weak, medium, or strong correlation depends on your goals and requirements.
For more information, go to What are Spearman's rho and Pearson's r for ordinal categories?.