Science matters shirt

Size guide
Athletic gray
Light blue
Heather gray

Observe, evaluate, explore, discover, create. The power of science to help us understand this earth and the universe around us is invaluable. We need to invest in more science education, more research, and wider dissemination of accumulated knowledge. Because science matters to all of us.

25% of profits from “Science matters” are donated to the Lawrence Hall of Science.

The Lawrence Hall of Science

The Lawrence Hall of Science programs and materials reach over 12 million young people, thousands of educators, and hundreds of organizations, in ways that transform science, technology, engineering and mathematics (STEM) learning locally, nationally, and globally. Our mission is to inspire and foster science learning for all—especially for those with limited access to science.

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Size guide

Below are the shirt brands Greater Ink uses for each shirt type, and the sizing information from each manufacturer. Use this as a rough guide to help you choose the best size of shirts from our shop. If you’re curious about our selections for shirt makes and models, read Product brands and models we use.

Shirts for adults
Bella + Canvas 3413 triblend short sleeve t-shirt. Material: 50% polyester, 25% combed ring-spun cotton, 25% rayon.
Size Chest
XS (x-small) 31"–34"
S (small) 34"–37"
M (medium) 38"–41"
L (large) 42"–45"
XL (x-large) 46"–49"
XXL (2x-large) 50"–53"
Shirts for women
Bella + Canvas 8413 ladies’ triblend short sleeve t-shirt. Material: 50% polyester, 25% combed ring-spun cotton, 25% rayon.
Size Fits sizes
S (small) 0–2
M (medium) 2–4
L (large) 6–8
XL (x-large) 8–10
XXL (2x-large) 12–14
Shirts for kids
Anvil 990B youth lightweight fashion t-shirt. Material: 100% ring-spun cotton.
Size Fits sizes
XS (x-small) 2–4
S (small) 6–8
M (medium) 10–12
L (large) 14–16
XL (x-large) 18–20
Shirts for girls
Next Level 3710 girl’s princess tee. Material: 100% combed ring-spun cotton.
Size Fits sizes
XS (x-small) 3–5
S (small) 6–6X
M (medium) 7–8
L (large) 10–12
XL (x-large) 14–16