http://www.uline.ca/Product/Detail/S-31 ... rds=S-3189
23 x 13 x 2 1⁄2" White Literature Mailers

I started to order these, but the shipping costs nearly doubled the price.XMIT wrote: For archival storage - as I do - I propose cutting away a short (2", 5cm or so) section of flaps to better enable the boxes to close. The IBM Model M, Dell AT101W, and AEK I and AEK II all fit nicely.
As clickykeyboards mentioned, these boxes are not ideal for shipping purposes - not alone, anyway. However, this box *inside* another box, with padding in between, would be really great. I have yet to ship a keyboard like this yet but know it will be way better than bubble wrap.
Here is where I got mine, way cheaper than Uline.
http://www.esupplystore.com/19-18-x-9-1 ... _3112.html