1.because it is manual measurement, the size will be 0.2-10mm error. 2.Product true colors, textures and images 98% identical, factory supply. Since the band width is not the same, so the length of the band will be different. If you strap length is required, please leave a message. Usually Strap width 12mm-24mm, Band length 18cm-22cm. We measured criteria are: width is 20mm, a length of about 21.5cm Material: japanese paper Dimensions: Length with about 11.5cm; short with about 7.5cm Width: 20mm / 18mm /16mm optional Thickness: Thin approximately 3-4mm Color: black, white, brown, red, 1. Items will be shipped within 1-3 business days after we verify your payment. 2. Please tell me your current address after your payment within 1-2 days; otherwise,we will ship your item based on your Escrow address, so make sure it is correct. 3. Sometimes it would be longer because of the bad weather, a waste of time in customs clearance. Thus please wait patiently when you do not receive your item on time. If you want a refund because of the item defect or some other quality problems, please contact us within 7 days after you get it. the fee relating to the reback mailing should be overtaken by yourself.