These buttons are 30mm wide and 16mm high. They're made of thin wood with the fan pattern printed on top that's then been sealed with a semi-gloss finish. The holes are 2mm wide.
These buttons can be used on items that are washed in a washing machine, but like all natural materials will keep its condition better if they are treated gently and hand washed.
Price is per button. There is slight variation in colour between buttons.