Granny style afghan using Bernat Mosaic yarn in Ambrosia colorway. I didn’t keep notes when I made this, but hook size is probably “H”. From pics, I see I started with 8 dc in a ring. Next round, 3dc between each dc (8 sets). Next round and subsequent rounds 3 dc, ch 2, 3 dc for corners and 3 dc for sides. (Regular granny style pattern). Continue until squares are the size you want.

The Bernat Mosaic yarn is acrylic but feels more like cotton. It is very thin in some spots and thicker in others.