Hint: Smaller than a baseball
The answer to this puzzle is:
1. BUTTERFLY
2. GOLFBALL
3. EGG
4. CANDY
5. APRICOT
6. SNOWFLAKE
7. CELL
8. PEBBLE
9. MOLECULE
10. VIRUS
11. INCH
12. TICK
13. WATCH
2. GOLFBALL
3. EGG
4. CANDY
5. APRICOT
6. SNOWFLAKE
7. CELL
8. PEBBLE
9. MOLECULE
10. VIRUS
11. INCH
12. TICK
13. WATCH