The 50c isn't double the size of the 10c, it's 18% wider. It has the same edge texture as the 10c coin. It's 1mm larger than the €1 coin, and 1.5mm smaller th

The 50c isn't double the size of the 10c, it's 18% wider. It has the same edge texture as the 10c coin. It's 1mm larger than the €1 coin, and 1.5mm smaller than the €2 coin. The 20c coin has 7 subtle indents, and is only 1mm larger than the 5c coin. Can you tell the difference when your hands are cold, or if you're wearing gloves? (I understand people lose their sense of touch in old age.) Meanwhile the 20p and 50p are heptagonal, with a similar 20% size increase. The 5p and 10p have a 26% size increase. They have milled edges, unlike the 1p and 2p.