Leaflet Design UK - flyer or postcard design.

One question that always reoccurs with leaflet design is which format to use for a cost-effective promotion - a standard A5 flyer or an A6 postcard designs. This primarily depends on what you are going for - impact or longevity. In leaflet design uk, postcard designs are smaller so they generally have less impact and presence, but in my experience they seem to be more likely to hang about than be immediately disposed of. Because of the positive connotations of postcards (holiday postcards / fine art postcards / letters from friends) they are seen as a less advertisy medium. So, if the postcard designs are appropriate, they may get stuck on a fridge, or tucked into a diary, or even passed to someone else. A flyer, on the other hand, is used exclusively for advertising, and advertising only, so although it may create that initial impact, it is more likely to be binned, faster. So this is the important question in leaflet design uk, flyer or postcard designs? It may sound like an arbitary choice, but mix the right format with the right design - and your promotion is likely to be that much stronger.