Dimension and printing problem

Bambu Lab A1 Series Bambu Lab A1 mini
1

Hello!
I would like to ask for some help. I have a file that I can’t print in the correct size. The manual measurement in the 1st picture shows that it is 18.6mm which is the correct size.

original dimension
original dimension1224×704 130 KB

When I click on the resize button, it writes the full size and prints the same wrong size.

wrong printed dimension
wrong printed dimension1164×690 114 KB

What could be the problem?

2

From your 1st pic, your measuring from inside to inside.
From the 2nd pic (resize pic), it measures from outside to outside.

3

The problem is that the inner size should be 18.6 mm, but the printed inner size is 23.7 mm.

4

kis TV- osszekoto2.3mf (26.3 KB)