Clothing tech pack freelancer in Vietnam

What is the best format for artwork in an apparel tech pack?

Artwork includes your logo, graphics, embroidery and appliqué (patches). Artwork can be placed on fabric, labels, hang-tags, poly-bags, carton-boxes etc.

The original artwork file will either be a photo or an illustration made with software like Photoshop, Adobe Illustrator or Corel Draw. These files need to be larger than 2 MB. They will be given to the factory along with the tech pack but separately, either by email or USB stick.

The placement and orientation of the artwork needs to be illustrated in the tech pack.