These were great back in the day - samples were sent to pro shops for their counter display to not take up so much space then several companies followed.

These balls are harder to find than most since they don't take up much space and collectors seem to never get rid of them.  I have 20-30 mini balls and would never let them go unless a duplicate comes across my desk.  Today is the day - picked this one up last week and happy to turn it over to another collector

Ball I didn't measure exactly but it's between 4 inches and 5 inches in total circumference. It's actually packed in a 5x5x5 box so I would say it's closer to 4 inches round.

As you can see in Pic 3, it has a few scratches on the back side of ball, not visable if you display one of the two labels.  I'm sure a lite sanding will also get them out but I don't like to touch them.

GL Bidding - these mini's actually get good value - you get to decide on that.