we hand fold/bag still, even though we are doing thousands of shirts at a time...it sucks. we use flip folds, taped down, with bags that fold close vs peel and stick. we use avery label sheets, off brands arent as easy to peel consistently. There are some label gun options that work well also with roll labels, but you have to be doing large amounts of the same sku, and we have unique sku's for everything, lots of variance. the fastest i can do the whole process is around 200 units an hour all in for any period of time. I've heard of people doing more than twice that, but im not sure if theyre folding, bagging, tagging, and boxing as part of those numbers, or doing it for an extended period of time.