An expanding direct mail piece is a promotional direct mail piece that is delivered flat and then expands either folding or extending out. The advantage of using an expanding direct mail piece is that they provide a lot of space to communicate your marketing message. These direct mail ideas are designed to create impact in an interactive way, producing real interest in your product or service. You can fit a lot of information in an item which is relatively small when mailed out. Because these mailers can be relatively small – from business card size – when they are closed they are ideal for use as giveaways at shows, exhibitions etc.