Threadrock Unisex Baby I'm So Irish I Poop Shamrocks Infant T-Shirt 100% Cotton Design exclusive to Threadrock 100% cotton jersey; ribbed crew neck; taped shoulder-to-shoulder; double-needle hemmed bottom and sleeves *Sizing Note* Our infant tees run small. We recommend ordering at least one size up. Available sizes: 6M, 12M, 18M, 24M