These are patterned on gingko leaves I collected from the park across from my office when I worked in Washington, DC. That's been a while, but they're still holding on! I usually make them in the following sizes:
4x4 inches; 6 1/4 inches; 14 inches; 20 inches; 24 inches; and 5x15 long trays.
Food- and fun-safe. Great for nature lovers (and those of us who think sleeping on the ground is WAY over-rated!)