You can make a standard envelope using a square piece of paper by following these steps from wikiHow :
: You can use old book pages to make "teeny tiny" envelopes by following guides from creative crafters . Fgronov rar
: Follow an origami tutorial like the one on ColorsPaper for a clean, fold-only design. You can make a standard envelope using a
: If you need a more professional look, use glue and scissors to follow step-by-step official envelope tutorials . Fgronov rar