This button up sleeveless tunic top by Flax can be worn as is or as a duster over a sweater as we transition into fall and winter. It doesn't have a material tag but it feels like linen, which is what every other FLAX piece I've ever encountered has been. It has a collar. It's a light blue grayish color. The video depicts the color most accurately. Flax size small, which is a size 6-8. the bust fully stretched from put to pit is approximately 18". the length from shoulder to hem is approximately 33". let me know if any others are needed. Pet and fragrance friendly home Check out my other flax and linen pieces. Lagenlook, granola girl, layered, flowy, relaxed, comfortable, bohemian, comfy, modest, beachy, minimalist, industrial, normcore, practical, basic, solid, coastal grandma, minimal, simple, modern, classy, classic, timeless, neutral, rural, monochrome, monochromatic, earthy, earth tones, natural fibers, natural materials, nautical, VSCO