The author has performed a statistical study on the vertical and horizontal distance between maxillary central incisors and incisive papilla, the maxillary intercanine width, and the form of maxillary dental arch. Stone models of maxillary dental arch were made in 403 Korean adults (300 male, 103 female) from 20 to 30. years of age. The results were as follows; 1. The vertical distance between maxillary central incisors and incisive papilla was 6.0mm.. 2. The horizontal distance between maxillary central incisors and incisive papilla was 9.0mm.. 3. The maxillary intercanine width was 37.7mm.. 4. The U type of maxillary dental arch was the greatest percentage with 68.2 %, the percentage for O type was about 21.4% and the V type 10.4%.