How soon should I order my wedding invitations?

We think, the sooner is definitely better.  

When ordering your handmade wedding invitations, it might be best to decide when you want them to go out to your guests and work backwards.

Things to consider -

2-3 weeks proof and print time.
1-5 business days shipping time.
How many days for your to hand address your invites.
1-5 days for guests to receive them once mailed.

These are all practical things to think about giving yourself at least 4 months prior to your wedding date as a general time frame.