Measurements of adult Black-throated Blue Warblers from Ridgway (1902) except as noted.

Male (n = 17)Female (n = 10)
MeanRangeMeanRange
Wing length65.262.0–67.061.160.0–63.0
Tail length51.149.0–54.048.547.5–51.0
Tarsus length18.717.5–19.518.618.0–19.0
Exposed Culmen9.48.5–10.09.29.0–9.5
Breeding mass (g) (1)9.8(± 0.5 SD, n = 70)10.1(± 0.9 SD, n = 55)
Wintering mass (g) (2)9.0(± 0.6 SD, n = 30)8.7(± 0.6 SD, n = 21)