How big is order number on customers' receipt?

[l0nglive]

Hi,

I"m looking for a solution for my business. it's a takeaway shop that normally calls people by number.

I write order on a book with numbered pages, then give the stud to customers and call the number accordingly.

I wonder the "auto assign order number" feature on Square works the same? Is the order number as big as Mcdonald?

[VanKalkerFarms]

The receipt number is no larger than any of the other text on the receipt.  It also is a random alpha-numeric code so it is not sequential either.  Unless there is a different order number for restaurants than other industries, but the sample image I found is a bistro so I would think that would have it.