Women's sizes run small. We recommend you buy ONE size larger for close fit and TWO sizes larger for relaxed fit.
Watch with hilarity as you see someone's face, at a distance, smiling as they see the cute kitty on your shirt. Watch it as it suddenly distorts into revulsion and disturbance as they get close enough to read the kitty's thought bubble. Laugh maniacally as they pass you with a genuine look of fear in their eyes. Or laugh hilariously TOGETHER as you've just found someone else with the same slightly skewed sense of humor.