Toddler and Youth are 2 different brands. Toddler is Rabbit Skins Brand and Youth is Gildan Brand.

I have included size charts with measurements for you reference. Please lay down a T-Shirt or sweatshirt that you have at home on a flat surface and measure via a measuring tape. To find what size best fits your child. You also may copy and paste the below into google to look up the products.

Toddler Fine Jersey T-Shirt - Rabbit Skins Style 3321

Toddler Fleece Crewneck Sweatshirt Style Rabbit Skins 3317 

60/40 cotton/polyester

Youth Soft style® Midweight Gildan T-Shirt - 65000B

100% ring-spun cotton

 Youth Heavy Blend™ Gildan Crewneck Sweatshirt - 18000B

50/50 cotton/polyester