The ideal proportions of the Wire Fox Terrier would be as depicted in the figure below:
Correct shoulder placement:
The tip of the shoulder blade (C) should lie behind the elbow(F) .So if you drop a straight line from C down to the ground it should pass behind the elbow (F)
The angle C to D to F should be 90 degrees
And the angle from C to D straight to the ground should hit the ground at 45 degrees.
Faults in Shoulder placement:
The shorter the over arm (humerus bone-A) is the steeper the shoulders tend to become. And with the shortening of A the tip of the shoulder bone (C) gets to lie in front of, or above the elbow-which is incorrect.
You want a good spring of ribs and the depth of the rib cage should reach the elbow(F)
Tail set and pelvis:
The back of the pelvic bone (G) should be well behind the base of the tale . The tale set should be well on top, with no palpable bump in front .
Bend of stifle and hocks:
You want a long first and second thigh( H and I) which should be as near as possible equal in length. .You want the hock joint to go down the rear pastern (J) at a right angle to the ground and want these to be as low to the ground as possible.