Searching for Flat Cards, A2-Insert (4-1/4-x-5-1/2) with Metallic, Shimmer appearance found in the White Color Group, 290 GSM (107lb Cover) --learn more about Pearl White --Shine Flat Cards. Also, review our popular help pages for paper help. (To make a successful paper selection, it is important to have a brief understanding of text weight and cover weight papers.) AND envelope help (It is important to remember that inserts must always be smaller than the envelope dimensions.)