What is the smallest print size that can be used in such a document?

Given the print sizes now common in the art world, that can no longer be said.

In Japan, the same print sizes (and several additional ones) are known by different names.

At these levels, the print size can be increased to 4 by 6 without succumbing to the jaggies.

The J number goes up as the print size of the text you read goes up.

The larger the number, the larger the print size.

This article will help you learn how to understand the relation between print size vs. resolution.

Could I get away with using it in a smaller print size?

But if you later crop these to standard print sizes, you'll end up with significantly less than the 8MP that most people will expect.

This is said to be in response to requests from readers who find the print size of the standard edition hard to read.