list the four-point grading scale for the size of tonsils
Grade 1: Tonsils just outside of the tonsillar fossa, <=25% of the oropharyngeal width. Grade 2: Tonsils occluding 26 to <=50% of the oropharyngeal width. Grade 3: Tonsils occluding 51 to <75% of the oropharyngeal width. Grade 4: Tonisl occluding greater than 75% of the oropharyngeal width.