It very much depends. Sometimes i save myself some time by using bases and then drawing over them, sometimes I steal a head from my any other skin and recolor it. It's usually from 1 to 3 hours, but when I decide to draw something from zero using only a reference art - it takes much longer.

I usually work on skins on and off, but if I had to put a number on it, it's definetely around the 2-4 hr mark!

My skins seemingly take only a few minutes to make

I mean, i don't really shade, so like, about 15-35 mins

I used to shade every pixel back in the day, but I got tired of doing that. My hands can't take it anymore, so now it takes me 1-3 hours. Admittedly, I like to readjust skins a lot, even after I'm done, because I overthink. :P

Sometimes I also work over a couple of days, but usually, the first two days are about an hour each, and everything after that is just small tweaks.

I dunno if it's just the ADHD but if a skin took me three hours, I don't think I would finish most of them.

They say like quality over quantity ect. ect. But also practice make perfect. I practice more, and learn faster, have more motivation ect. If I complete them quickly.

Don't always produce great things, but being a perfectionist has turned me aggressively ah whatever I ain't sittin' 'ere for five hours tryna fix it. My as well start again, not like it's gonna take longer. Because if I do get into 'perfection' mode I will be there forever.

I make my skins over a couple of days, but I only sink an hour or two into each session, so it's hard to say.

<1 hour because i don't do very complex skins

Can you add an option for under an hour for all of us 2d underachievers?

It depends on certain factors for me, but when inspired I can fully make one from nothing to fully shaded in about 5 or 6 hours maybe even less if I'm really not procastinating and going into it.
Apart from those times it usually takes about 8 hours if I do it all in one day, but I mostly make them over the course of a few days so it's more like 5-20 minutes a day until it reaches a point where it cumulates into about 8 hours as well.
The only times where it takes longer are the cases where I'm either doing something new (be it a theme, or shading style), updating my personal skin (it's my most important project in my eyes) or the rare cases where I need to use Paint.Net to manually change something (be it a mistake, misplaced pixels, etc).

tbh, i never spend any longer than 3 hours making a skin, even if it is more detailed; it’s probably because i use skindex to make my skins, so it’s a lot easier therefore faster - even if the quality of skin isn’t as good as if it were made on pmc editor.
but 15-25 hours still seems crazy to me like what? i imagine you don’t spend 15 consecutive hours skinning but still that’s wild