Since when does a country dictate what packaging you send through its postal service??

Exactly what I asked when I found out. My local Postie replied, "Since 911".

I really cannot see the connection with aircraft crashing into large buildings and slim letters dusted in white powders.. so, go figure.

But the US Customs service now requires that parcels from Canada which mass over 1KG must measure at least 25cm in one dimension. I forget the other two dimensions, but the 25cm (10") is the sticky bit for the 8x8x3" docks right now.

I've ordered the new boxes, oughta have them in two weeks or so.

Cheers