I created this chunky afghan with chunky yarn and K hook. The dimensions are 46 inches by 66 inches. This blanket is so soft and cozy when it's finished. I uploaded a video if you need more assistance.
sl st=slip stitch
Velvet Yarn, K hook
Row 1: Chain 119
Dc in the 4th chain from the hook, *skip the next ch, (dc, ch 1, dc) in the next ch, skip the next chain, dc in the next 2 chs; *Repeat until the end, end with dc in the last two chains
Row 2: Ch 3 (counts as dc), Turn, dc in the next dc, *skip the next dc, (dc, ch 1, dc) in the next ch 1 space, skip the next dc, dc in the next 2 dc, *Repeat across, end with dc in the last two dc,
**Repeat Row 2 for the rest of the afghan, until it reaches 66 inches or as long as you prefer.