Charmion, I started using Zenni a few years ago and have been totally happy with the results. It looks like their standard shipping to Canada is 2 to 3 weeks. I typically receive my glasses within 2 to 3 weeks after placing the order, so that's about 10 days for production and a week for shipping within the US. I'm guessing you'd be looking at an extra week.

The thing with them is to upload a headshot and then you can try on your glasses virtually. The main number to know is "PD" - pupil distance - and that never changes, so once you have it you're set. And knowing how to enter your Rx into the form. I found the staff at the optometrist's office were helpful in explaining what each set of numbers means, including telling me my PD number.