Thick, sturdy bright white cardstock meets USPS mailing standards; perfect for invitations, seasonal offers, recipes, flashcards and more. Ultra-fine perforations allow for quick and easy separation. Easy to customize using free Avery? design tools, QR codes and templates. Paper Color(s): Matte White; Card Height: 4 1/4"; Card Width: 5 1/2"; Cards Per Sheet: 4.