In the view of this shop, these are the best available giant cards. Unlike the majority, they are printed on card stock, albeit slightly thicker, and manufactured by a playing card manufacturer. Most card companies, including USPCC, outsource their jumbo cards. Not Piatnik though, where quality is always at the forefront.
 
Specifications:
Size: 178 x 116mm.
Indexes: Two corners.
Finish: Smooth Finish.
 
Manufactured in Austria.