I've been using these for about two years, and they're in beautiful condition with no noticeable stains. I purchased them separately to match the sizes. The reference prices are: Navy blue curtains are 150x200, 8,990 yen. Lace curtains are 150x197, 7,990 yen. They are blackout and flame-retardant. I'm also selling a set with different sizes of the same color!