Make sure all lines are at least 1 pt thick and keep font sizes above 10 pt, avoiding serif fonts where possible. Keep any solid coverage under 1.00″ × 1.00″ and set your design to 100% black for best results. Before exporting, remove all non-artwork layers, save your file as a PDF/X-1a, and note that design placement can be selected after upload.
* may appear blank until opened in Adobe software. Please do not save your design in the 'artwork guidelines' group layer or it will not print.