This pattern is a child’s size 4 but it’s a pretty loose fit so it can probably be worn from ages 3-5.
https://www.purlsoho.com/create/2013/07/04/mollys-sketchbook-toddler-t-shirt/
https://www.purlsoho.com/create/wp-content/uploads/2013/07/toddler_tee_template_REV.pdf
The template itself is only one page. The remaining pieces are all rectangles. You will cut two rectangles 14 inches wide by 17 inches tall for the Body Pieces and two rectangles 6 inches wide by 12 inches tall for the Sleeve Pieces. Together with the pieces from the template, you will have all the pieces that you need for this sweet little top!