I had my ring sized at a G last year (I have tiny fingers!) My ring is a little loose and I prefer a tighter fit and after getting my finger sized up again it turns out I’m more of an F1/2. How long would it take to have my ring downsized by 1/2 a size? It’s a solitaire band so I’m guessing it should be fairly straightforward? Also am I best going to my local jewellers or a high street store?