Primary mass versus mass ratio within MM (filled dark blue circle), SS (filled light red circle), and SM (open light blue circle) UWPs. Intermediate (resp. smallest) size of marks: UWPs separated by less than 35 kAU (resp. less than 10 kA), the largest size devoted to wider UWPs beyond 35 kAU. Dashed lines: brown dwarfs (BD)/planet (0.012 M_⊙) and BD/star (0.075 M_⊙) limits. Dotted line: 0.8 M_⊙ star limit. The superpositions are due to the discretized nature of mass determination models from the spectral type and evolutionary tracks.