Handmade, the error value is normal within 3 cm. Normal version: W11*H22*T9 (cm) Extended version: W11*H30*T8.5 (cm) The strap length is approximately 22 cm. In Taiwan, if you choose to mail the shipping fee, the postage will not be refunded. The Hong Kong area can be sent directly to SF Express or collect goods. The shipping fee is about NT$120 (within 1kg). The actual shipping cost is mainly informed by the driver. Please understand the relevant fees before ordering.