Here is the recipe I used to make a hexipuff out of Bernat Baby Jacquards. This yarn is a sport weight 100% acrylic that self-patterns.
What's a hexipuff? It's a motif used in making The Beekeeper's Quilt. The pattern calls for a fingering weight sock yarn, but I'm using all my scraps - including worsted weight. There are a series of posts on my blog about adjusting the pattern to make hexipuffs of the same size from all different types of yarn. These are modifications - you'll still need to buy a copy of the official pattern to make the quilt.
The modifications are generally to (a) the number of stitches cast on, (b) the total number of stitches the puff reaches at its widest point, and (c) whether there are extra plain knit rows added to the ones specified by the pattern.
This results in a hexipuff that is 3" in diameter (1.5" on each side).
Cast on 10 sts per needle on US size 3's.
Increase as described in pattern to 20 stitches per needle.
Decrease and bind off as described in pattern.
(No extra knit rows.)