Some folks use HH snake skins. There use to be a few different sizes but i think their all #4 or large now. That works well for most sil tarps. Some folks prefer Mesh skins made from no-se-um netting. If your going to buy there's a woman in Ncal, mountaingoat on the forum , who makes made to order mesh snake skins . My last mesh skins i made in two parts, one for each end of the tarp and i believe the taper was 8" and 4", that was for a spinn tarp i have but sil could be made narrower.
" The mind creates the abyss, the heart crosses it."
“The measure of your life will not be in what you accumulate, but in what you give away.” ~Wayne Dyer