"How big are those Bluegill?? Over a pound easy....."
"How thick is that ice? Every bit of 5 inches....."
For want of an accurate measuring device, both statements are accepted at face value. And both, are often proved incorrect.
Always, always check the ice for yourself. Buy a spud bar, or make one, and use it...wear your picks also. And never become complacent about your safety. Ice conditions can be extremely variable, and change greatly over a short period of time.