Hornets work inside their nest on the window of Donna Adams home in Warner Robins.
Adams said the nest appeared about two weeks ago and was about one and a half inches round. Since it has grown to almost 5 inches across.
She said she was surprised when she opened the drapes and saw how big it had grown.
"I thought it was amazing. I've seen a hornets' nest before. But I thought this was unique that I could see the inside of it," Adams said.
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Most of her seven grandchildren have seen the nest so she plans to remove it by the end of the week before it becomes too big.