1 Rupee: One rupee coins are made of copper-plated steel. They are round in shape and have a diameter of 18.0 mm.
2 Rupees: Two rupees coins are also made of copper-plated steel. They are slightly larger than one rupee coins, with a diameter of 22.0 mm.
5 Rupees: Five rupees coins are made of cupro-nickel, an alloy of copper and nickel. They are round in shape and have a diameter of 24.0 mm.
10 Rupees: Ten rupees coins are also made of cupro-nickel. They are larger than five rupees coins, with a diameter of 28.0 mm.
25 Rupees: Twenty-five rupees coins are made of a combination of copper, zinc, and nickel. They are heptagonal (seven-sided) in shape and have a diameter of 30.0 mm.
50 Rupees: Fifty rupees coins are made of a combination of copper, zinc, and nickel. They are also heptagonal in shape and have a diameter of 32.0 mm.
It is worth noting that the State Bank of Pakistan, which is the central bank of the country, is responsible for issuing and regulating coins and banknotes in Pakistan. The bank regularly updates the designs and materials used for coins to enhance their security and appearance.