These lab-grade cork stoppers are size 18. Size 18 means that the stopper is roughly 3/2" tall, 3/2" in its top diameter, and 5/4" in its bottom diameter. They are sold in a pack of 100 stoppers.
PRODUCT WARNINGS
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.