DovidBT: Since there are certain materials that are used today that were not used 100 years ago and are questionable to some authorities if they require tzitzis or not. We have minimum standards….everyone agrees that wool begadim need tzitzes. Many stores sell “mesh” tzitzes. Not everyone agrees that this type of beged requires tzitzes….hence ask your LOR whether he allows it or not.
There is no question that is too small or too big for your LOR unless he tells you to otherwise. Many years ago, one of my children had a deep cut that a doctor in shul determined that stitches were required. I asked the Rav about walking to the hospital or being driven by a non-jew. His answer to me was you know the halachah. My response was that I was asking him as he was the LOR and had smicha and was able to pasken for me.