Cardstock › Have a Great Summer Coordinating Cardstock - Green/Blue Image 1 of 1 Have a Great Summer Coordinating Cardstock - Green/Blue $1.10 Have A Great Summer - 12x12 Solid Paper. Printed two sides on 65lb Accent Opaque Cardstock. Quantity: Add To Cart Added! Have A Great Summer - 12x12 Solid Paper. Printed two sides on 65lb Accent Opaque Cardstock.