#606A & #606B
Your armhole diameter is the width of your arms when held against the torso, the height of the armhole is only one ingredient for a better range of movement. Check your armhole measurement to get a closer size of PGM dress form magnetic arm.
0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 16L, 18L, 20L, 22L, 24L, 26L
Your dress form shoulder pad must be metal, or have metal piece under the shoulder pad.