According to Bob Lazar, the Government documents he reviewed stated that the aliens or Extraterrestrial Biological Entities (EBEs) were from the fourth planet orbiting Zeta 2 Reticuli, the second star of a binary system in the Constellation Reticulum.  A day on Zeta 2 Reticuli Planet 4 is about 90 hours long.

The Reticulan EBEs are three to four feet tall and weigh twenty-five to fifty pounds.  Their bodies vaguely resemble a human toddler’s torso if emaciated from hunger.  They have grayish skin and large heads with almond shaped wrap-around eyes.  They have very slight nose, mouth, and ear positions and are hairless.  Bob Lazar was not able to give any detail from the lower abdomen down, and to date, any other information corroborating this description only refers to the EBE’s head.