How long is the soon in "Coming Soon"?

I typically label an item as coming soon when the design is finished and I have sent it off for production. The time is takes for me to get the product and everything I need can vary, but I'd say it can be anywhere from two or three weeks.

How are stickers shipped?

This will depend on how many you order. If it's a relativley small order it's shipped via USPS snail mail style inside an envelope between cardstock. If you have a large order or opt for tracking, I'll ship it through a USPS Flat Rate envelope which is made out a semi-rigid cardboard.