Answer:
My first is in some but not in all. My second is in tiny but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing rugs used every day.
I come in different colors and shapes. Some parts of me are curvy, some are straight. I look like I can belong anywhere but there is only one right place for me. What am I?
The more holes you cover the lower I go.
I have fangs and enjoy piecing holes with a single bite.
I am commonly ate before I'm born and after I'm dead.
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.