There are many stains that look like they might come off with washing. Please check the images uploaded at the end. Free Size Average size for men and women: 54-58cm Snapback cap, so adjustable by about ±2cm Depth: Approximately 13-14cm 100% Cotton If you think your head is smaller or larger than average, please comment beforehand to check the size. I will measure and answer how small or large it can go. Since this is a wearable item, returns are not accepted after purchase.