When we print your artwork for mugs and bottles, we wrap the print around the product. So it's a good idea to think about what you want to appear depending on where someone may hold the product. This is especially important for products with a handle, as what you see, and the people looking at you whilst you hold the item will see different things.
The 'Details' tab on each product shows the print area in mm. It is best to prepare your artwork at these sizes.
Our artwork team will follow your instructions and create an artwork proof. It will be helpful if you can provide some directions in the Notes or Special Instructions field when uploading your artwork. For example, you could write "Fit my design to the maximum printable area".