I've been using elastic trouser bands for a long time. The ends stay together with velcro.
They've been annoying me. My ankles are narrower than my calves so the bands slip down. I have to adjust them at inconvenient times.
Long ago, I had these oversized clips similar to paper clips. Their purpose was to clip the trousers at the bottoms to narrow them. It was another approach, but I don't think I want to do that. I could try binder clips.
Now I'm thinking of using these bands. They would go under my heels in my shoes and pull my trousers down. I suppose I'll discover the flaw in this idea, too. Probably, it will be that I have to keep them in my shoes and let them dangle or take my shoes off to remove them.
What are some workable ideas?