First dinosaur hat that does not require sewing! It's worked from the top down, then the spikes are crocheted over the hat. It's a great unisex hat that will be a great gift for a new baby. It is also an awesome hat for a dinosaur fan of any age! A cute little flower (instructions included) can be added to customize the hat for a girl. GAUGE 16 stitches and 8 rows = 4 inches in in double crochet US SIZING / FINISHED MEASUREMENTS Finished measurements: 13 (151/2, 18, 201/2, 23)" circumference to fit 3-9 months (9-18 months, child, teen/adult S, adult M) with 1-2" of negative ease.