Hi Colin,

This can vary based on your image resolution, the product you are ordering and other various factors. For example, an image uploaded onto an invitation will transfer differently than the same image on a shirt.

You are welcome to reference this link for more helpful information:
https://help.zazzle.com/hc/en-us/articles/219861927-Creating-and-Uploading-Images-to-Zazzle

Thank you,
Tram

Clocks we ordered looked reasonable close up, but dark clock hands on a dark background were almost unreadable.