MEETWEEMen’s Sport T-Shirt, Breathable Cool Dry Mesh Base Layer Tops Short Sleeve Running Top Gym Shirt

What’s the width along the bottom of either a small or medium? (I ordered both and they’re both the same - I presume one was mis-labelled

Are these made of a stretchy material? Need something with alot of flexability

How many t-shirt?

Is the red top a 'true red' or more like a maroon/burgundy/wine colour red?