**** Update from August 2nd: I suggest ordering one size down (instead of 2). Now that I've washed the shirts, they've gotten smaller and are now sitting on my girls. π₯7/31: I was surprised to measure my daughters from side to side of the breast. I used it to choose her size and hoped for the best. Both are of average height and weight. My oldest daughter usually wears a large size or 10/12. I ordered her a small and it fits perfectly. My youngest daughter usually wears a size M or 7/8. I ordered her a very small one and it fits perfectly too. I was very hesitant to go 2 sizes down but I'm glad I trusted the reviews on this one. Enter the height and weight of the eldest daughter here (the size runs small for this shirt).
π Hanes Boys' Short Sleeve T-shirt Value Pack (3-pack) - Essential Wardrobe Basics
44 Review
Star Wars, Marvel, and Disney Short-Sleeve T-Shirts for Boys from Amazon Essentials
50 Review
Soft Brushed Fleece Crewneck Sweatshirt for π Boys and Girls 4-12 Years - Kid Nation Kids
42 Review
The Good Day Lab Clean Shield: Ultimate Comfort and Breathability in Tagless 4-Way Stretch Polo
43 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review