Thickness: 0.22mm (6-7 mil) This stock is ultrathin, light weight, and flexible. This stock has a pearl essence surface that while also having transparency. Can only be printed on one side due to its transparency. Standard round corners are included. These cards are waterproof, tear proof and very resilient. Avoid light colors. There is no white in CMYK offset printing so any white areas in your design will be left unprinted revealing the pearl stock itself.