These sound like technical (even painful) terms, but they're actually quite simple:
This is the portion of your design that will be trimmed off when the card is cut to the final size. Its purpose is to make sure your design or image reaches right to the very edge of the cards, leaving no unsightly white edges.
If you're designing cards before you upload, you'll need to make your artwork 'Full Bleed' size to account for this. You'll find a list of 'Full Bleed' recommended sizes here, or we have a range of templates available for every product.
This is the final size of your cards, after the 'bleed' has been cut off.
This is an area inside the 'Trim'. Being smaller than your final card, the safe area is kept well away from blades and cutting machines, and so this is where you should place your most important information or sections of your design. Anything outside of this area runs a risk of being cut off!
All sounding too complicated? We've put together a dedicated FAQ, which explains the 'bleed', 'trim' and ‘safe area’ more clearly. It also shows common mistakes and how to avoid them.