ave8383 - avery photo-quality glossy postcards for inkjet printers avery 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 colors: glossy white card height: 4 1/4amp;quot; card width: 5 1/2amp;quot; cards per sheet: 4.