That's a great question! The answer is yes, most meteoroids that cause meteors are about the size of a pebble.

Here's why:

* Most meteoroids are tiny: The vast majority of meteoroids are very small, ranging from a grain of sand to a golf ball.

* Friction with the atmosphere: When these small meteoroids enter Earth's atmosphere, they encounter intense friction, causing them to heat up and glow, creating the streak of light we call a meteor.

* Most burn up completely: The majority of these small meteoroids burn up completely before reaching the ground.

* Larger meteoroids are rarer: Larger meteoroids, like those the size of a basketball or larger, are much rarer. These are more likely to produce bright fireballs and even leave meteorites on the ground.

So, while there are larger meteoroids out there, the average meteor-producing meteoroid is indeed about the size of a pebble.