Review on 🧭 Inexpensive Survival Kit & Hobby Compasses: 12 Air-Damped Magnetic Plastic Compasses, 20mm Diameter by Christopher Todd

I only received 11 because the thin plastic bag they came in was torn; This presumably happened before they were placed in the envelope as the envelope was sealed and although I fished out a few from the bottom of the envelope I still only have 11. They appear to be working as intended; Exactly what I expected for this price. A compass I measured showed 19.6mm on my calipers, but it still rounds up to 20, so it's fine.