The Master of Studies (M.St.) is a postgraduate academic master's degree awarded by Oxford University and Cambridge University in the United Kingdom. The degree is typically studied for in Law, Fine Art, Humanities or Social Science and can be either fully-taught, research-based, or a combination of the two.

Assuming all requirements are met, the M.St. degree is generally awarded after about one year of full time study. The M.St. is considered equivalent to the French diplôme d'études approfondies (DEA) and Spanish Diploma de Estudios Avanzados (DEA), in addition to other master's degrees such as the LL.M. (Master of Laws), M.Sc. (Master of Science), etc.