Vintage Chicago Cubs Blue Youth Hoodie: 12y?

Vintage early 80s Chicago Cubs MLB hoodie in heathered blue with classic team logo and lettering across the chest. Soft cotton blend with kangaroo pocket, attached hood, and ribbed trim. Cozy sportswear staple with authentic vintage wear. Tagged adult M but runs very small. Estimating adult XS or S, or youth 12/14y. Please check measurements! Amazing vintage wear with some paint (?) inside one arm.