Toddler tees are Rabbit Skins. Youth and adult are Comfort Colors. Shades vary between brands. A YXS Comfort Colors shirt fits a 4/5.
2T, 3T, 4T, 5/6, YXS, YS, YM, YL, YXL, Adult Small, Adult Medium, Adult Large, Adult XL, Adult 2X, Adult 3X
Light Blue (pictured), Bright Blue, Pink
Pre-K, Kindergarten, Fourth Grade, First Grade, Second Grade, Third Grade, Fifth Grade