Abstract. Studies of large radio galaxies are important for understanding the late stages of evolution of radio sources and constraining their evolutionary models. These sources could also be used as probes of the intergalactic medium at different redshifts. The larger ones of these are over a Mpc in size and are referred to as giant radio sources. We present a multi-frequency study of five such large radio galaxies, J0318+684, J0949+732, J1211+743, J1918+742 and J2042+751, whose projected linear sizes range from about 0.8 to 1.5 Mpc. Their redshifts range from about 0.05 to 0.2. The low-frequency observations were made with the Giant Metrewave Radio Telescope (GMRT), while the high-frequency ones were made with the Very Large Array (VLA). We present the structure and spectra of these sources over a large frequency range, estimate their spectral ages and compare these results with model expectations.