How long does a SIM take through the post from SMARTY?

SKE_82  It's easier to ask "How long is a piece of string?". It depends upon a lot of factors e.g. what postal service is like in your area, whether there are any hold-ups like local flooding over the last few days.

I've ordered a few Smarty SIMs in the past. They are sent first class, and have usually arrived the next working day after I've ordered them. Obviously Smarty have no control over the postal service in your area, though, and I've seen a few posts on here where people have not received their SIMs after several days.