Now I need to measure the bustsuck depth. It is measured like this. From the point of the neck in the center of the front I make a right angle. The first side of the corner is horizontal. And the second side of the corner should rest against the plane of the bust. I need the number on the tape which is the apex of the corner. And I use this figure. I open the side of the compass to the length of this measurement. For example 10 cm and make an arc from point A3. I measure the length of the line from point A3 to the bust point and make a second arc with a centimeter tape until it intersects with the first arc. This is point A4. Now I connect the A4 point with the bust point with a line. I measure the length of the line from point A3 to the bust point with a centimeter tape until it intersects with the first arc.