Material :polyester,Gauze 2 tiers ,one tier is polyester fabric curtain ,one tier is gauze fabric curtain Blackout 30-35% The size :the size options in the listing are the tiled dimensions,so when you choose the size ,you can consider getting curtains 0.5-1 times larger than the window. For Example: If the width of the window is 39", the curtain width recommended to be 59"-79",this will have a wrinkled effect, which looks very nice Custom Size was acceptable Return Policy Return or exchange are not acceptable ,especially custom orders ,if you have any problem ,you can contact me first We accept cancellation within 12 hours ,there is a 20% fabric charge for cancellations over 12 hours Wash instruction Before washing curtains, we recommend that you gently dust them with a vacuum cleaner or soft brush to remove dust and impurities. This will help reduce dirt and stains during the washing process. Machine washable was allowed Hang the curtains to dry naturally, out of direct sunlight Note: Due to the influence of lighting, display and other reasons, there will be a certain color difference, which is a normal phenomenon. It is normal that there will be a few centimeters of error in manual measurement, and returns or refunds for this reason are not accepted.