The couple believe the youngsters have inherited their track star father's long limbs. And they said that Farah was the first to hold the girls - with Aisha weighing in at 5lb 2oz, and Amani, 4lb 4oz - after he cut the umbilical cord.
Tania said: "He was almost bouncing-off-the-walls excited."
They told the magazine that if labour had begun early, during the Olympics, they had agreed that Farah should not be told to allow him to focus on his dreams of victory.
The runner said he had already had an "incredible" year. "I dreamt of becoming an Olympic champion and to do it twice in your country with a stadium of 80,000 people shouting your name, it doesn't get better than that," he said. "Then for my wife to have two healthy little girls, well there's no way to describe it."
Farah has a step-daughter, Rihanna, who is seven, and she and Tania were seen celebrating with him after his 10,000m victory.