The background color is off-white, not pure white. Material: I can't say for sure, but it seems like cotton. Diameter: Approximately 130cm There are some stains (see photo 4). For those who understand that this is a used item, how about it? (Washed) The color may be slightly different from the actual product due to the photography. I am a non-smoker and do not have any pets. I look forward to purchases from those who agree to recycled packaging. Thank you for looking.