Origami Paper Dimensions

Usually, i use paper with the dimensions of 8 x 8 inches (about 20 x 20 cm). This is for an average sized model. For smaller models, I'd suggest 6 x 6 inches (about 15 x 15 cm), but i wouldn't go smaller than 4 x 4 inches (about 10 x 10 cm.) People will fold larger models, up to 20 x 20 inches (about 51 x 51 cm). If I want a larger model, I usually will go up to 12 x 12 inches (about 30 x 30 cm) at the most.