It may be size of cut. I used one once on something I definitely should have gotten stitches for(folding knife closed on my thumb, and I reactively pulled away

It may be size of cut. I used one once on something I definitely should have gotten stitches for(folding knife closed on my thumb, and I reactively pulled away), and it did scar. For shaving cuts, typical knife cuts, paper cuts, etc, noticed nothing really.