I would love borders on my banner or sign, is that cool?

Unfortunately, borders are a no-no for printing.

Borders are problematic since all substrates vary for each batch. This makes precise cutting almost impossible. For Grand4mat, it’s strongly recommended not to add borders on your design.

If you insist on including them, go for borders about 2 inches thick.

However, do note that if you send a file containing borders, Grand4mat will not do a reprint in case the print shows differences in border size and positioning.