Ahh, I didn't know those were #1 pencils, I used them also in my first grade year. Apparently there are #3 and also #2.5 pencils. I have always seen #2 pencils and every test you take or form you fill out you are instructed to use a #2 pencil. I have honestly never seen a #3 or #2.5.
I used to sneak in #1 pencils to take tests. I was so out of control.