- Spirit Shirt Size: Our spirit shirts have an oversized fit. They run larger than Comfort Colors tees. Models are size 0 and are wearing size small or xs in our pictures. Some customers choose to size down 1 in these while others buy their true size. Because personal preference varies, we are offering you the choice!! If you are unsure- go with the smallest size you wear if you sometimes choose a smaller size in varying items. We do not recommend ever sizing up in this item. However, these will shrink. Machine wash cold. Hang dry.