We were talking in the office the other day about how big a QR code should be for a transit poster we are working on. One thing that I have noticed personally is that these QR codes draw attention… especially when they are big.

Our conversations and testing eventually led to the conclusion that a 4″ by 4″ sized QR code would be right for this project. Considering the poster was 47″ wide, I was really hoping for 47″ x 47″ (you would be able to scan that thing from across the street!)

This made me wounder… who has done this BIG? What is the biggest QR code implementation to date?

QR Codes On Billboards
http://gizmodo.com/5587753/nycs-sexiest-billboard-doesnt-care-for-dumphones
Calvin Klein utilizes a bill board sized QR code to link your smart phone to a 40 second commercial. This is a great example of utilizing rich media (the video) with a traditional platform (the billboard).

QR Code In A Field (Crop circle??!)
http://www.flickr.com/photos/hopfengaertner/166681885/in/set-72057594129393836/
Completely useless (scans to the text “Hello, world!”), but extremely neat. (Yes, I use the word “neat”)

And The Winner Is: QR Code On The Side of A Building
http://mobile.engadget.com/2006/12/22/japanese-apartment-sports-worlds-largest-qr-code/
This is on the side of a building in Japan. It’s an apartment building that is under construction, and I can only assume it leads to a mobile website with information for potential customers. Obviously, it’s huge (>15mx15m), and it can be scanned from a fair distance away.

So, for those of you who were wondering, no… that QR code displayed above is not the biggest.

I looked into projecting a William Joseph QR Code onto the moon to really make this post “pop”, but aside being fiscally unfeasible (I asked our CFO and it turns out there is actually no budget for Lunar projection this year), it turns out it’s also completely impossible from a technological standpoint. Too bad.

So, what you see above is the next best thing.