Created in 1999, the catalog (Karachentsev et al., 1999) contains 4236 thin edge-on spiral galaxies with a blue diameter greater than a = 40 arcsec and a blue major-to-minor axis ratio a/b ≥ 7 over the whole sky. Additionally, for the sake of continuity, the catalog includes 208 objects from the previous versions, which ceased to meet the selection criterion after the specification of their parameters. RFGC is a revised and combined version of The Flat Galaxy Catalogue (FGC, Karachentsev et al., 1994) and its southern extension (FGCE). The FGC objects (N=2573) were found during during systematic visual inspection of all O-prints of the Palomar Observatory Sky Survey (−20° ≲ δ ≤ +90°), while FGCE objects (N=1882) were selected on the J-films of the ESO/SERC sky survey. The 291 galaxies from FGC and FGCE were excluded from the final version of RFGC due to the violation of the a/b ≥ 7 criterion.