Display chart size on screen

[Ric-ka2d]

When I open an Excel workbook which contains a chart of size 15 x 30 cm, it displays on my screen as 14.41 x 30.87 cm - why is the size different on my screen?

[#2]

Hello @Ric-ka2d , on which screen do you see the size of 15 x 30 cm?