WC door sign is made of white ceramic and glazed with cobalt blue glaze. Looks very vintage! The sign can be glued on any surface. Item size: 4 x 2.1/4" Will be packed carefully and shipped in 1-3 business days. You can find the same sign with other glazes in my shop section Door numbers and signs: https://www.etsy.com/shop/CERAMICSbyVITA?ref=hdr_shop_menu§ion_id=19168040 Wish You a wonderful day!