Table 1.

Size of Spheres Used in Inches and Millimeters.

	Sphere size
Assessment used	1/16 in.	mm
No	1	1.6
No	2	3.2
Yes	3	4.8
Yes	4	6.4
Yes	5	7.9
Yes	6	9.5
No	7	11.1
No	8	12.7