There are a lot of different artwork file formats, some good, some not so good.
The type of file you can use will also depend on the artwork program you have used to create it in.
Ideally we would like a vector artwork file with all text converted to curves or outlines. Any of the following files would be great, AI, EPS or PDF.
We can accept Photoshop .PSD files, please make sure all text layers are rasterized, and the design is saved at 300 DPI at actual print size.
We can also accept the following files, jpg, jpeg, bmp, gif, tiff or png. but please make sure the resolution is good, and the design is supplied at the size you need it printing.
Saving a thumbnail size image from Google and asking for it to be printed across the front of a T-Shirt does not work well.
You can email your designs to firstname.lastname@example.org
For files to large to e-mail we recommend using a free file transfer system like WeTransfer