Cotton chenille is used double and knit very firmly to give this crusher hat its shape. Knit-in band uses a contrasting rayon blend. Optional knit flower pattern included. Sizes: Small & Large; to fit head size up to 21.5" (23")Yarn Requirements: 280 (300) yards of worsted weight cotton chenille, plus approx 25 yards of contrast for band. You may use multiple strands of contrast to match the gauge of the cotton chenille used double.Needles: 24" (60cm) circular size 7 (4.5mm) for brim. You will also need double pointed needles in size 7 (4.5mm). A 16" circular is optional.