These Dust-proof Bags Are Made of Soft & Breathable Silk Fabric. Carefully Designed & Tested, Its Thickness & Softness is an Ideal Grade, Durability & Comfort.(handmade. Each Bag is Unique & May Vary Slightly in Size, Each Bag has an Easy to Pull Drawstring Closure, Which Can Prevent Items From Spilling with Just a Gentle Pull. Machine Washable So You Dont Have to Worry About Your Bags Getting Dirty, Just Toss This in the Washing Machine on Cold, Gentle Bicycle to Minimize Shrinkage & Then Hang to Dry. Sample Size is 19.6 Inch*15.6 Inch, Other Size Pls Contact Us for Details.