Silver unisex ring w/ a black 8ball on front- I think a size 8 but not 100%

Silver unisex ring w/ a black 8ball on front- I think a size 8 but not 100% - also there is no imprint on the inside of the band so I’m sure isn’t sterling silver more likely stainless steel but again not 100% - a friend inherited them and doesn’t wear jewelry and gave them all to me bc I do these sales