10 hryvnia coin has entered into circulation today in Ukraine

The National Bank of Ukraine on June 3 introduces into circulation 10 UAH coin, which will eventually replace the corresponding notes 
The reverse of the coins features the portrait of Ukrainian Hetman 
"Starting June 3, 2020, 10 UAH coins will be valid means of payment in Ukraine, they can be used to pay for goods in the trade network or carry out operations in banks,” – the regulator said in the statement. 
The new coin with a face value of 10 hryvnias is small in size, its diameter is 23.5 mm, weight is 6.4 grams. The coin is made of zinc alloy with galvanic nickel coating.  

Source.