Should Roy Hodgson use him against Italy, Butland will replace Billy Moon as England's youngest goalkeeper.
The Old Westminsters and Corinthians keeper Moon was 19 years and 222 days old when he made his debut against Wales in 1888. At 19 years and 158 days, the Birmingham babe will beat that by 64 days.
Butland told The Sun: "Age is just a number. It's not relevant to me and I wish no one made a fuss about it. If you are good enough you are old enough. I'd hate to think I was getting looked on favourably, or being held back due to my age.
"Joe Hart is the perfect example. Everyone knew what a great keeper he was but when the World Cup came, people were still pointing to his age and suggesting that England needed experience. He never played in South Africa yet, when it was over, he was immediately handed the No 1 shirt and looked as if he'd been there all his life."