Mammillaria gracilis gragilis or thimble cactus
This cactus is very tiny. Each piece is about the size of one section of your finger. You sure need your reading glasses to check out this baby. But as you can see it does have stickers that will get you. And if you thought the plant is small the flowers are ity bity. They are so tiny the best way to see them is with your camera or a magnifying glass. LOL Happy Cactus Monday everyone!