liquibase-core/src/main/java/liquibase/datatype/core/CharType.java
protected int getSize() {
        if (getParameters().length == 0) {
            return -1;
        }

        if (getParameters()[0] instanceof String) {
            return Integer.parseInt((String) getParameters()[0]);
        }

        if (getParameters()[0] instanceof Number) {
            return ((Number) getParameters()[0]).intValue();
        }

        return -1;
    }
protected int getSize() {
        if (getParameters().length == 0) {
            return -1;
        }

        if (getParameters()[0] instanceof String) {
            return Integer.parseInt((String) getParameters()[0]);
        }

        if (getParameters()[0] instanceof Number) {
            return ((Number) getParameters()[0]).intValue();
        }

        return -1;
    }
Return the size of this data type definition. If unknown or unspecified, return -1