This star blanket is made with double crochet (treble UK) and features a row of bobble stitch every fourth row.

You can make the blanket as big as you like by working until you reach the size you want.
I worked to round 33 then did the Picot edging and it was 36 inches from point to point. If you work to the end of the pattern it would turn out around 56 inches from point to point.

Materials

Upto 750 meters (3 balls) of dk, weight 3 yarn in the main colour (I used Deramores Studio 100g in White) (this was for a 36 inch blanket, if wanting bigger you would need more)
Approx 100 meters each of six rainbow colours
4mm hook

Written in US terms with abbreviations for UK

The PDF is 8 pages