One size fits most. What a great party hat to wear at the office for birthdays and celebrations! Everyone will want one. This is so cute to wear for an afternoon walk too! Hat is knit circular up to top. Then pick up stitches at bottom of hat to make pointed edge trim! Has a swirl around color pattern that is fun to knit too! Uses worsted weight yarns, knitting needles, 16 circular, US # 7. You will some double pointed needles to finish decreasing at top. Add a pompon to top of hat if desired!