Ultra-thin at 0.9mm, this product contains 30 sheets to prevent sweat stains! I'm selling these because the size didn't fit my clothes. This is a 30-sheet (new) set, as I used about 10 sheets from a 40-sheet set! - Product Name: Sweat Stain/Dirt Prevention Sheet - Size: 23.5cm x 3.8cm - Thickness: 0.9 mm - Contents: 30 sheets ※ In some cases, the included instruction manual may be folded for shipping to reduce shipping costs. ※ Please be sure to check if it fits your clothes or hats before purchasing. Thank you for your understanding! Instant purchase OK! Ships within 1-2 days. Thank you for reading to the end! #AdhesiveSweatStainAndDirtPreventionSheet #SweatStainSheet #DirtPreventionSheet