Head circumference dimensions: No.: 5 = 54 cm. No.: 6 = 55 cm. No.: 7 = 56 cm. No.: 8 = 57 cm. No.: 9 = 58 cm. The inner full embroidery sponge material in the furing layer is comfortable in use Thank you please in order!!!!! Items price includes shipping fee that should be borne by the buyer.