Adding order details to address label's for shipping

[shophelp123]

How can I automatically include custom notes on my 2x1 envelope shipping labels in Shopify, displaying details such as ordered items and quantities, without relying on customers to provide this information. It would make my fulfilling process a lot easier rather then clicking thru each order to see there orders, I can just see it on the label.

[Mirdas]

Print packing slips and see if it helps. 

[shophelp123]

I read that, it doesn't say whether or not we can change the dimensions of the label.