Does the given size for a given ball represent its actual circumference, or is it some other size?
1074421
These sizes are for the diameter of the balls (across) and not circumference (around). The page you use to select sizes also shows the equivalent in inches. I am 6'2" and the large (75cm) ball is about the height of a chair. My wife uses the medium size as she is 5'9". Good quality balls. I still use mine often after ~3 yrs.
1074422
You have to fill the ball with air. I use a small air compressor attached to my cars dc plug. The more you fill the ball the larger it gets. We use them for acrobatics at our dance studio, it actually can get bigger then the specifications.
1386792
The circumference is the length of a ruler. If you want to find the diameter of that circle that's divide the length of a ruler by 3.14159 and you will get diameter. For the radius divide diameter by 2.
1488588
I'm not sure the exact measurements, but it seems to be close to the actual size of a pool ball, maybe just a shade smaller.
1647705
I do not know the exact diameter, but I drilled a bigger hole to fit, what I think is, a regular ball.
532185
You know what, if this is the ball that I wrote was smaller than expected, then that's probably accurate. Definitely not a ball that the kids use for handball, but I'm no authority
2192419
I did not measure the ball. It was perfect for a 3-4 year old. It is too small for 6-8 yrs old.
1728695
I haven't tried a full regulation size ball, but we have a junior size ball that seems to fit just right.
1925639
No, the 10 & 12 pound balls are the same size as a basketball. The 4, 6 & 8lbs balls are smaller [about a 3rd smaller]
1616288
Not sure what a #4 is but the basketball is the standard youth size. Bought it for my first grader last year and it's the same size used in his basketball league. Good ball.
1548196
I do not believe the size is on the ball but I would say it's a small ball. The smallest of the three choices when buying an exercise ball.
243969
I'm not sure what the "measurement for the ball diameter" is but if you've ever used a fitness ball at the gym, is the biggest one they've got which I think is the standard size.
1695255
These are baseballs NOT softballs. These baseballs are the official size and weight of a MLB baseball.The size of the BASEBALL is 9 inches in circumference.
1877843
This item is larger than a tennis ball. there are three sizes... small is tennis ball size. there is an x-large about the size of a softball and large is in between.
1876337
Don't know exactly, but it's a little bit longer than an iPhone 5 (diameter). The appropiate measure to the mini ball is "size 1", and the whole circumference is 17inches. Size 5 is the one that is used in FIFA matches, and it has 27 to 28 inches of circumference.
998862
I gave it as a gift to someone; we play often but I can't summon up the exact size in my memory.
1491625
I really don't have an accurate measurement but it's between the size of a baseball and softball, leaning more to the baseball size.
768220
As stated on the site it is a size 3. This is a youth size ball, not a standard size for adults.