Not all classrooms have four walls. Shirt Details - Cream, Olive, & Slate Grey: 100% Organic Unbleached Cotton // Made in the USA // No harmful chemicals, pesticides, or artificial dyes. - Mustard & Mauve: 100% Cotton - Unisex Fit - Sizing: See size chart in product images for more details. Measurements can vary up to 1 inch depending on color, material, etc. - Please note that the organic tees may have some specks of natural color from the organic shirt making process. - All assembled in a WRAP certified, eco-friendly, anti-sweatshop environment. - Professionally printed in McCook Lake, South Dakota and made to order to prevent waste.