When my brother graduated from high school they gave him a pocket-sized laminated copy of his diploma in a cover that made it look like a passport. That was about as useful as business-card-resumes.
All resumes, full-size, pocket-size, flashy or lame are becoming obsolete. It’s not practical to expect recruiters or hiring managers to hold on to pocket size resumes; trade shows and job fairs included. When’s the last time you really “accepted” a resume from a candidate anyway. Better idea – have business representatives carry generic business cards with your companies web address, job categories, locations, etc and ask the candidate to apply online! That’s what you really want anyway, right?