Ball hit by Mickey Mantle on April 17, 1953 at Griffith Stadium to set a new distance record for home runs. (Courtesy the National Baseball Hall of Fame) The longest home run ever hit did not go 565 feet. Not even close. Actually, the longest home run ever hit isn't even the longest home run ever hit.
At the minimum, a baby must be able to hold his head up steadily and have his feet touch the floor to use a walker. Walkers are designed for use by infants between the ages of 4 and 16 months, according to Consumer Reports, and children who can already walk should not use them.
The average age would be somewhere around 12 months. But average for babies across the world has nothing to do with it. What matters is what is average for your baby. You have babies that are pulling up as early as 5 months and walking as early as 7 months, or even earlier.