RinfitSilicone Rings for Women 6 Ring Pack - Unique Set of Thin and Stackable Bands for Women. Designed, Soft Silicone Rubber.(Size 6)

Is the silicone solid gold or is it just a gold coating on top?

I wear a size 7.5, would it be best to a little small with a 7 or a little big with an 8. I am not sure if there are free returns if it is doesn't fit

I’m a size m, what size is that in number please

What is the return policy if it doesn’t fit?