Holy Land MarketHolyLandMarket Womens Pink with Gold Messianic Shawl / Tallit - The Messiah Tallit Large

Whta's the significance of the different colors of tallits? I've heard pink is Esther, Blue is Joseph, etc. Which to buy?

Do you sell the kippah separetely ?

Is the fabric of the Tallit Wool? Cotton? The description doesn't say.

Why are there different sizes and how do I choose a size?