"One billion feels like a small number for the opportunity of what's possible," she said at the Forbes' third annual Women's Summit here, reports femalefirst.co.uk.

Alba, who has daughters Honor, six, and Haven, three, with husband Cash Warren, added: "For me, as a person at home with my kids? It's crazy. It's awesome."

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The "Sin City" star admits it was initially difficult to convince people to take her company seriously because of her Hollywood status.

She said: "People just saw me as this girl in a bikini in movies kicking b'tt -- maybe not the brightest bulb. It took three and a half years of condescending nods and pats on the back of 'good luck', or 'go back to endorsing things or go do a perfume'."