The thickness is 1.55mm which is measured at the rim of the coin.
The 1903 Indian Head cent is a common coin most are valued at $1.00-$3.00
The 1903 Indian Head cent is a high mintage common coin and the value depends on the condition of the coin. The average retail value is $1.00-$3.00 for most coins.
The diameter of all US small cents is 19.05mm
Wheat cents were struck from 1909 to 1958. If your coin is dated 1903 it's an Indian head cent.
It is called a "mini coin". They are manufactured as a novelty and have no numismatic {fancy word for coin collecting} value.
August 5, 2009 Indian Head cents from 1900, 1902 and 1903 have a circulated value from $1 to about $20 depending upon the actual condition of the coin.
8-22-11>>> Assuming the coin is circulated, the 1903 Indian Head cent is a common coin of the series. For an accurate assessment of value the coin needs to be seen and graded. In general retail values for average grade coins are $1.00-$3.00, but only for coins in collectible condition, coins that are bent, corroded, scratched, used as jewelry or have been cleaned have little or no value to a collector or dealer.
There was never a silver Indian Head penny.
There were no Indian Head coins minted in 1803.
If your coin is smaller than a normal US cent (19 mm) it's not real. Several companies make miniature replicas. They have no value to coin collectors.
Are you asking about a Indian head penny or a nickel? Post a new question with the denomination and date of the coin.
A average 1903 Liberty Head 5 cent coin in collectible condition has retail values of $1.00-$3.00