​I always use veg tan "economy" leather.  The reason I use so called economy leather is that the sides have all the nicks, scars and bite marks that the cows get throughout their lives. It, in my opinion,  adds character to the sheaths I make. I could always buy super sides that are fit for a Ferrari but then the character wouldn't be there. Below is a small selection of my leather work, including a couple of bits "outside the box"