Not to be IgG‐nored - An integrative strategy combining ion mobility mass spectrometry (IM‐MS) with molecular modelling can be used to study the conformational dynamics of human IgG antibodies. Predictive models of all four human IgG subclasses were assembled and their dynamics sampled in the transition from extended to collapsed state during IM‐MS. The structural representation is in good agreement with the observed collision cross sections.