Luckily, in addition to understanding the math, EdenFantasys has the ability to show you the actual size of the toy. Click the ruler-shaped graphic under the pictures of the toy. Then, hold up a real ruler, your credit card, or a dollar to your screen, and slide the calibrator to make it real size.
Then you can hold up your favorite toy to the picture of the toy on the screen, and find out which ones are comparable in size!
I also go by diameter (which is across the center of the toy) because it is easier for me to visualize. I can't use anything over a 1.25 diameter, personally, without really working up to it. Other people find that much too small!
To convert circumference to diameter, or vice versa, it's really easy! Circumference is diameter times pi
, which is approximately 3.14. It's not exact, so it won't give you an exact answer. However, you can use a calculator like this one
to solve for unknown quantities, and not have to do any math at all. Just plug in the circumference or diameter, and it will give you the measurements for the others.
Once you find out your ideal size, it's easy to look at the numbers and know immediately if it's a good toy for you.