
Here is the confusion for another decade.
The coins must differ in size with respect to its value but not in India. The newly introduced coins Re.1 & Rs.2 exactly matched the size of existing 50 paise & Re. 1 respectively.

RBI Governor's imaginary response to this confusion galore,
1. Oh! is there an existing coin system? I thought I am the first one to introduce coin system in India
2. I am only dealing with currency notes and why should I care about the coins
3. I want to teach the value of money to Indians
There is a 50 paise coin with a fist and 1 rupee coin with thumbs up.
No surprise to deflate the ongoing inflation, RBI will introduce negative value coins engraved with thumbs down.