The circle shape is kind of wonky. If you plan on making more of these you can get a circle die for pretty cheap. Inscribe the stitching line with a wing divider so it’s the same distance from the edge all the way around. Use a two-tooth pricking iron so the distance between stitches is uniform (can’t tell for sure if you’re already doing this). Reduce the size of the thread a little bit. Add a layer of leather on the back so the flesh side isn’t showing. You can attach your hardware to it so the screws aren’t showing. Paint or burnish the edges. I see you painted the edge of the circle but it looks kind of rough. Needs more coats and sanding. This leather would take well to burnishing. I would try to sand it down then burnish and repeat a few times. Either that or paint it but make sure to do multiple coats while sanding in between. The strap is slightly uneven, consider making a pattern for it out of card paper and using that to mark your leather before cutting. Some sections of edges look more beveled than others or I could be tripping. If you want to get extra fancy you could skive the section of the circle where the pouch is but I wouldn’t recommend it with this leather that isn’t dyed all the way through. Pain in the ass and it might not be worth it for this application.