It looks like a little turbin— that’s what it’s called that.
These come from the Chihuahuan Desert in Mexico.
This is a really cool little cactus. It doesn’t get very big and it likes to be by itself— as in don’t crowd a lot of them together.
Give it well draining soil. I wouldn’t let it get below 40F. Treat it as you would most any desert style plant. But give it room to breath— don’t crowd it with other plants.
Your plant is similar in size to those in the smaller picture. Your plant will ship bare root.