This origami envelope is one of the easiest to make! Here is a step by step photo tutorial with instructions. You will need some square paper, starting white side up.
start white side up bring the bottom up to the top just pinch the edges to make a mark open out bring the bottom edge to the center again pinch the edges to leave a mark on both sides you can see where the marks should be fold the bottom edge to the previous 2 marks you made. fold the newly created bottom edge to the centre marks fold well there are two marks on either side bring the top edge down to those two marks. unfold the previous step and fold the bottom right corner fold the bottom left corner turn the model clockwise fold the bottom edge upwards using the corner folds as a guide turn model clockwise again fold up using corner folds as a guide rotate clockwise fold the top corners diagonally aligning to the horizontal fold left corner now fold the top point down and tuck it into the bottom fold finished, if you enjoyed please share this tutorial with your friends!