Use inside jaw spread
Figure 1. How to measure a foot trap
Figure 2. How to measure a body-gripping trap
Note: The Environmental Conservation Law (Section 11-1101) defines how body-gripping traps are measured. You need to measure the inside distance between the outer frames of the trap. The addition of one or more bars to the inside of the frame does not change the way these traps are measured. The measurement is still the maximum distance as shown in this picture.