6M 12M 18M 24M Width, in 10.00 10.98 12.01 12.99 Length, in 12.48 13.46 14.45 15.47 Sleeve length, in 3.74 4.02 4.49 4.76 The infant fine jersey tee is a balance between comfort and durability. This fabric is specially spun to be strong and smooth. Solid colors are 100% cotton. Other colors feature polyester. There are side seams. The collar has ribbed knitting for improved durability. The shoulders are tapped with twill for improved fitting. .: 100% Combed ringspun cotton (fiber content may vary for different colors) .: Light fabric (4.5 oz/yd² (153 g/m²)) .: Classic fit .: Runs true to size .: 100% Combed ringspun cotton (fiber content may vary for different colors) .: Light fabric (4.5 oz/yd² (153 g/m²)) .: Classic fit .: Runs true to size