How to add a "select options" button

I sell soap and want to have a drop down menu for the different scented soaps. Where do I go (what steps) in Woo Commerce to have such a drop down menu next to the product? Could you please explain it in simple terms? Go to…click on…enter… click update…Thanks anyone. I’m getting closer to finishing this webpage and I have spent way too many hours just trying to understand the technical language.