Define "larger sized"
The US made no pennies in 1956 except for the small size wheat pennies which are the same size of the pennies today.
You may be referring to a commonwealth pre-decimal penny. Since the UK didn't issue any pennies bearing the 1956 date, it is likely Another Country, if you look at the legend it should tell you what country it is from.
A penny.
Around 3 cents.
3 cents
3 cents.
About 3 cents.
1.00 to 20.00. du...................
This coin is common and is worth 2 to 4 cents.
It's worth about 3 cents. It's old, but not rare or valuable.
2 to 7 cents in circulatated grades. This coin is not rare.
3-10 cents on average. It's not a rare or valuable coin.
These coins are worth an average of 2 to 6 cents in circulated grades. They can easily be acquired from pocket change.
The value of a 1956 double die penny can vary significantly based on its condition and whether it is indeed a double die variety. If it is a standard 1956 penny, it may be worth only a few cents, but a genuine double die penny can be valued anywhere from a few hundred to several thousand dollars. It's important to have it authenticated by a professional to determine its true value.