This natural Pink Tourmaline baguette cut stone is a 7x3mm. I have set it in a handmade sterling silver ring. This ring is a fun stacking ring, which I make also in other stones. It looks great with the square plain band that I sell. Pink Tourmaline is one of the birthstones for October. The ring is a size 7 but can be sized up or down up to 2 sizes.