Never understood the appeal of this until I saw some finished projects with unstuffed “puffs” and the sides properly seamed. I’m planning on using sock yarn (or other superwash fingering weight wool) scraps -- will probably be years before it’s big enough to actually use.

I haven’t decided yet if I’ll be doing a crochet or mattress stitch seam -- the advantage of the crochet is that I love the look of a solid border around the hexagons, but the disadvantage is that I’d need to buy yarn specifically for the border, which rather defeats the purpose of a blanket to use up scraps. If I opt to mattress stitch it (which I probably will), I’ll use the scraps that are too small for a full hexagon to seam.

Size 5 needles give me a perfectly hexagonal 2.75” hex. I could go up a size and get gauge, but I don’t like my size 6 needle options as well (I’m using magic loop on my size 5 addi turbo with one spare dpn for casting on and binding off instead of using three dpns), and I do like the fabric I’m getting with the size 5s pretty well, so I’m going to stick with this size. --I’ve since switched to three dpns, but I’m still really liking the size 5s.