Seamless DIY Fix for very baggy trousers (how to make the waist smaller)

Abercrombie pants, quince sweater xs, Uniqlo jacket xx’s (my fit review), Sarah Flint pumps 35.5 (similar to cheaper), Arranged Menstrual belt xx’s, goyard bag Over the last few years, my waist size has fluctuated quite a bit, and some of the trousers I previously bought a size larger are now too loose. As a quick …