I would say at least one size up depending on your finger. Especially if you want to wear on index finger. My index finger needs about half a size bigger than middle finger. For my ring I’ve only gone up half a size, because I was afraid it’s gonna be too big, which I regret so much... now it barely fits my index finger, luckily I can still wear it on middle finger. And I can’t even adjust the ring size due to the design..
I was considering a wide band design for my three stone project, @Mekp but decided against it as it would limit my stacking options. I don’t have much real estate for stacking to begin with. So that was kinda the clincher for me. But who knows? I might change my mind yet again.
PS: I’ve been wanting a change from my usual slim, platinum ring repertoire and bought a cigar band instead to scratch that itch. Waiting for it to arrive but here’s a photo of 6.3mm band.
Love it and it looks great on you. So much fun to enjoy the sparkles! Sometimes I put on some of my diamond pieces and walk in our basement because the lighting makes them sparkle like crazy.