These lab-grade cork stoppers are size 20. Size 20 means that the stopper is roughly 3/2" tall, 13/8" in its top diameter, and 43/32" in its bottom diameter. They are sold in a pack of 10 stoppers.
This product contains small parts, making it a choking hazard. Only use with adult supervision.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.