No, an ounce would be too heavy to use as an estimate for the weight of a pencil.

Here's why:

* An ounce is about 28 grams.

* A pencil typically weighs around 5-10 grams.

Therefore, an ounce would be significantly heavier than a pencil. You would be better off using grams or even a smaller unit like milligrams to estimate the weight of a pencil.