Quick answer

Measure your child's chest and height, then compare to the garment's specific size chart — tri-blend tees fit slightly slimmer than 100% cotton styles.

Why fabric matters for fit

A youth t-shirt's fabric blend directly affects how it fits after washing. 100% cotton tees, like the Somerset Patriots Youth Girls Midnight Navy Motion Blur Princess Tee, tend to shrink slightly in length and width, especially in a warm wash. Tri-blend fabrics (polyester/cotton/rayon) like the Somerset Patriots Youth Jersey Diners Red Tri-blend State & Eggs Mickey Tee resist shrinkage and have a softer, drapier feel that runs closer to the body. If your child prefers a roomier, classic tee, cotton is the better choice; for a more modern, athletic cut, go with a tri-blend.

Size up or down?

Youth sizing is not standardized across brands. Somerset Patriots youth tees are cut to fit typical children's proportions, but the exact measurements vary by style. The Motion Blur Princess Tee (4.3 oz 100% cotton) is a standard fit, while the tri-blend Mickey Tee (3.8 oz) runs slightly trimmer. Always check the individual product size chart rather than relying on your child's age or previous brand size. If your child is between sizes, choose the larger size for a growing room or the smaller size for a snug, fitted look.

How to find the right size

  1. Measure your child's chest and height: Use a soft measuring tape around the fullest part of the chest (just under the armpits) and from the top of the head to the floor. Write both numbers down. Most youth size charts use chest circumference and height as primary guides. Common mistake: measuring over bulky clothing. Measure against bare skin or a thin undershirt.
  2. Check the product-specific size chart: Open the product page for the Somerset Patriots youth tee you want. Scroll to the 'Size & Fit' tab and compare your child's chest and height to the chart. Ignore age ranges — they are averages and often inaccurate. Checkpoint: if your child's chest measurement falls at the top of one size, consider the next size up for comfort.
  3. Factor in fabric and shrinkage: For 100% cotton tees (like the Motion Blur Princess Tee), expect about 3-5% shrinkage in length after the first wash. Wash in cold water and tumble dry on low to minimize this. Tri-blend and cotton-polyester tees (like the Mickey Tee or Zorros Plane Copa T-shirt) shrink much less. Common mistake: assuming all tees shrink the same amount. Always read the garment material on the product page.
  4. Decide on the desired fit: If your child prefers a relaxed, slightly loose fit for play, choose the size that matches their chest measurement. For a more fitted or 'stylish' look, especially with tri-blend tees, you can size down one step if the chest measurement is near the bottom of the range. Checkpoint: for toddlers who are still growing quickly, buying one size up extends the wear time without looking oversized.