In multi-color prints for certain products, it is possible that colors could shift up to 1/8" or even 1/4" in any direction. Even so, we always aim to do the best print job so that our customers are satisfied.
If any minor shifting will be a concern for you, please consider changing your art to one color. 98% of our customers print their art in one color.
See below for the worst case examples of possible shifting:
Possible Worst Cases of Mis-Registrations: