Poppy Crafts 12"x 12" Premuim White Cardstock 300gsm - 10 Sheets. Looking for the perfect card to work on for your next exciting project? Well, with this captivating Poppy Crafts Cardstock, you won’t need to look any further. This is the perfect cardstock to use for making special occasion invitations such as birthdays, weddings and more! This pack includes 10 sheets of high-quality 300gsm cardstock. Size: 12"x 12" (30.5cm x 30.5cm).