How difficult is it to post a print?

I've run out of stiff envelopes so I wandered down to Staples last night only to find that they no longer stock anything suitable for sending prints in the post. So I rooted around at home and found a used envelope in which to send off my print. This does mean that Simon will have to wait for his print until my supply of fresh envelops is delivered.

Anyway, I get to work this morning with the envelope all addressed and ready to send, but then I realised that I had forgeten both my wallet and my lose change so I was unable to purchase a stamp

So after borrowing some money of a colleague I've finally posted my print, which should be with its recipient by this weekend's deadline.