"Did You Make That Yourself?"

Today, when a CPer posted about her discomfort over people's well-meaning question, "Did you make that?" I realized that for months I've been wondering what are the dead giveaways that a crocheted garment or accessory is either storebought or a one-of-a-kind handmade?

[Remaining draft deleted because it wished to become an article instead, and it will appear in the upcoming issue of Crochet me.]