Oh, for that type, I'd start out like I do the top of a hat. Chain 6, join and sc 2 in each chain, 10 sts (the 6th chain kind of gets hidden in the join). Then next round sc, 2 sc in one st, around - 15 sts. Next round sc, sc, 2 sc in 1 st, repeat - 20 sts. Keep adding one more sc before you do the 2 in 1, adding 5 sts each round (it's good to place a piece of yarn as a marker) until it's the right size.