Holiday fun – a test of observation skills

The day after Thanksgiving, my thoughts turn to an ongoing Christmas project.
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It all began several years ago, when I saw small Christmas stockings in a store. I liked how they were decorated in detail, but not the color (pale blue) or the price (several dollars each). Besides, most of the time, seeing something I like makes me itch to craft it myself.
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So I couldn't wait to get home to design and make my own, smaller stockings:
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They are 1-1/4 inch wide. The bright blue and black ones, in my husband's favorite color pair, are for us. The gray and dusty blue ones are for my big brother's family, in colors I've seen them wear.
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The following year, I made six mittens. The year after that, hats. Then scarves, and now shoulder bags:
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Here's the puzzle to test your observations skills: the black and bright blue ornaments follow a pattern, but there are four departures (deviations, details that don't follow the pattern). Can you spot them?

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Click here for clues and the answer.