I saw this stitch for some time already, it looks so similar to bobble stitch but larger, giving bumpier texture, good for baby blanket, and floor rugs. I have shared some different crochet stitches on my site, I do love the puff stitch, and trying to crochet some simple project by enjoying the softness it brings out. We have some puff stitch projects before, Crochet Braided Puff Stitch Free Pattern and Tutorial is so beautiful, and you can also check out Crochet Bubble Puff Stitch Scarf Necklace (Video). This interesting balloon stitch looks so different with its texture and also look special with those balloons bump it up. You can see it is not that hard after you try it and it looks so good as cardigan sleeves or boots topper.
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Click the link here for Spanish tutorial : Point ballons crochet relief, for English pattern, keep reading
Click the link here for free pattern and video: Stitch of the week #13: “Balloon” stitch