Larger image on packing list

Looking to enlarge the image size and quality on the packing list. We've found it really useful to have an image of the product, in reducing errors. We check the picked items from laptops and tablets, and have found sometimes the image can be grainy or too small, especially when checking on tablets. Although we aren't printing out the packing list, I appreicate that others may be - so it could be offered as an alternative option?