Crystal Report field needs to handle certain max chars

Programmers have to make sure what the fonts type and size to be used.

It is easy to code if it is a monospaced font – where every char is of same width. Some of the Monospaced fonts are Courier, Prestige Elite, and Monaco.
If they are not Monospaced font, Please make sure to test it with data that has only the max width char. Usually 'W' char will be the max width char in the char.

Some fonts come with thin and wide flavors. - 'Arial Thin’, 'Arial', 'Arial Wide'. Programmers might have to play with them to meet the requirement.

Printer performance is another concern – Dot matrix printer act differently than Laser printer. Confirming the printer type helps a lot.

Good luck in fixing this kind of requirement on first attempt. This always ends up being a example for the Chaos model.