Spreadshirt Darwin I Think Tree Women's T-Shirt Designed and printed in the USA. This awesomely nerdy design features Darwin's sketch of the evolutionary tree of life. Makes a perfect gift for all who are studying biology or other natural sciences. This classic tee offers plenty of room and is ideal for most body types. Contoured and side seamed for a feminine fit. You'll love the way you look in this durable, reliable classic. 100% pre-shrunk, midweight cotton (except for heathered colors); Fabric weight: 5.0 oz. For best results and to maximize durability machine wash cold, inside out and tumble dry on low heat. Official sizing (width x length measured in inches): S (17.5" x 24") | M (18.5" x 25.5") | L (19.5" x 26.5") | XL (21" x 28") | XXL (23.5" x 29") | 3XL (25.5" x 30"). Item runs small.