I have a 2mm Platinum band I bought preloved from a wonderful PSer a few years ago -- it's ring size 7 but fits me tighter than my other size 7 rings -- I would sell for $160 (including USPS Priority Insured shipping).
If you're interested, feel free to reach out to me through this LT listing
https://loupetroop.com/users/marymm
I have a platinum Stuller band that’s a 6.5!