The flax seeds that I buy, are small, flat, shiny and brown. They have the shape of a sunflower seed, but are much smaller. Be careful not to spill any of these. They are hard to clean up. If you do it once, you'll see what I mean.
They don't look gross to me; I kind of like them because of their shiny texture. But, then it might be because I'm used to seeing them around.
To save on costs, I buy my flax seeds in 25lb. bags.