G2000 button up top, sz 5

Grey polyester button up top, lined with acetate, 18" sleeves, when buttoned up buttons are hidden. Says size 5, should fit MP. Also says dry clean only, but I've washed it cold/delicates cycle, hang dry & steamed. Was just a smidge too tight on my fore arms between elbow & wrist, sleeve end at wrist should accommodate forearm measuring up to 9" circumference.