What are smart trousers and what is their actual use ?

What color watch and rings should I wear, something classy and elegant, the photo is there to confirm if there is any necessity to match accessories according to skin tone or not, or is it necessary to match them with my glasses ?

It was a college party/high tea last night, I decided to wear a black high neck and black dress pants, golden rings for accessories, black derby shoes. I have a black coat but it turned out to be smaller than last year, ig I'll have to get a new one. How's the fit by the way ?

I got these rings, both are size 9, the band is a bit loose for my left ring finger, I wanted to balance it with the signet in my right Index, but I have it now on my left index, the band ring. I feel the signet is a bit to bulky and I want to use it but I think it's not giving the right look/aura I wanna project. I need advice on how to and with what shall I style them. The gold color is an idea from chatgpt(warm undertone). What other accessories will I need according these rings ?

Here is another collection of unposted past outfits all featuring the same olive green jacket. I hope this becomes a source of inspiration for someone. Enjoy!