First of all, what is the bleed area? What’s a safe zone? Why do we care about these in printing?
Bleed is extra background color added to your artwork that ensures your design is printed from edge to edge without leaving uneven borders on your product. Bleed area gets cut off during the production process, but the safe zone does not. All of the design elements you want to have printed should be within the safe zone (shown below):
The bleed area is the outer dark red area in our product hub and everything within that space will be trimmed off. You should still extend your design to the edge of this area to prevent the appearance of irregular white borders.
The trim line is the outer white dotted line which shows the cut / sew line for the product. You’ll have to extend your design past this line to account for a cutting margin of error. Anything in this area might be trimmed off slightly in some products.
The safe zone is the inner white dotted line. Any artwork inside this line will not be cropped, so you’ll want to keep all your important content within this white box.