toucheChimpanzee males can measure up to 160 centimetres (63 inches).
( https://en.wikipedia.org/wiki/Eastern_chimpanzee )
The average Woman's height in america, from a study in 2010, is 162 centimeters (63.8 inches)
So knowing that, when Detective Chimp gets hit, his body could act in the same way as a female hurt-box allowing all applicable combos to work on him. He could also increase the size of his hurt-box by walking backwards, jumping, attacking, etc.