Their report follows the experience of London receptionist Nicola Thorp, who was sent home from work in December 2015 for not wearing high heels.
Her parliamentary petition on the issue gained more than 150,000 signatures.
MPs also heard from women asked to wear shorter skirts and unbutton blouses, and of dress codes detailing nail varnish shade and hair root colour.
The joint report, High Heels and Workplace Dress Codes, comes from parliamentary committees for Petitions and for Women and Equalities. More