Square with Tabs - Envelope Designer Karen Elaine Thomas Paper Other Pieces 1 Difficulty 2 2 / 5 Rating 4 4 / 5 Diagrams Description The author suggests using a sheet of paper 8.5 by 12 inches (21.5 by 30.5 cm). The size of the finished model will be 4 inches (10 cm) square. Publications in which this model is published Origami Card Craft - 30 Clever Cards and Envelopes to FoldPage117