You may use any kind of paper to fold this origami heart. I am using a paper with the same red color on both sides. Make sure the paper that you use is a square (all sides are equal and all the angles equal 90 degrees). The paper I am using here is 20cm x 20cm square one. It is a good size for those who are not experienced in paper folding. If you are become familiar with this model. Then you can try smaller size paper.

Step 1: Square Base

01.Let's start with "square base" . Prepare to apply two vertical valley-folds.

02.Apply two vertical valley-folds of the step #1.Prepare to unfold two valley-folds.

Step 2: Inside Reverse-folds

03.Unfold previous two valley-folds.Prepare to apply two "inside reverse-folds" .

04.Apply two valley-fold of the step #3.Prepare to open the front-most layer following the arrow

Step 3: Inside Reverse-fold

05.Open the front-most layer.Prepare to apply an "inside reverse-fold"

06. Apply the "inside reverse-fold" of the step #5.Prepare to close it.

Step 4: Front-most Layer

07.Close the front-most layer.Prepare to open the front-most layer following the arrow.

08.Open the front-most layer.Prepare to apply an "inside reverse-fold" .

Step 5: Start for 5 Step

09.Apply the "inside reverse-fold" of the step #8.Prepare to close it.

10.Close the flap.Prepare to turn the model over.

Step 6: Start for 6 Step

11.Turn the model over.Prepare to repeat the steps #1-10.

12.Repeat the steps #1-10.Prepare to apply a horizontal valley-fold.

Step 7: 7

13.Apply the horizontal valley-fold of the step #12.Prepare to apply a vertical valley-fold.

14.Apply the vertical valley-fold of the step #13.Prepare to turn the model over.

Step 8: 8

15.Turn the model over.Prepare to apply a horizontal valley-fold.

16.Apply the horizontal valley-fold of the step #15.Prepare to apply a vertical valley-fold.

Step 9: 9

17.Apply the vertical valley-fold of the step #16.Prepare to apply two valley-folds.These valley-folds are 45 degree angle folds and these foldings should be done just below the front-most layer.

18.Apply two valley-folds of the step #17.Prepare to apply a valley-fold and then unfold

Step 10: 10

19.Apply the valley-fold of the step #18 and then unfold.Prepare to apply an "open sink-fold" .

20.The crease patter of "open sink-fold" of the step #19 is shown here.

Step 11: 11

21.Apply the open sink-fold.Prepare to press two edges down.

22.Press two edges down.Prepare to rotate the model by 90 degrees.

Step 12: 12

rotate the model by 90 degrees.Prepare to apply an "inside reverse-fold" .24th picture of origami heart with wing

24.Apply the inside reverse-fold of the step #23.

Step 13: 13

25.Prepare to turn the model over.

26.Turn the model over.Prepare to apply a valley-fold.
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Step 14: 14

27.Apply the valley-fold of the step #26.Prepare to apply a mountain-fold and then unfold

28.Apply the mountain-fold of the step #27.Prepare to unfold
29.Unfold the previous fold.Prepare to apply a mountain-fold. 30th picture of origami heart with wings
30.Apply the mountain-fold of the step #29.

Step 15: 15

31.Unfold the previous fold.Prepare to apply the CP on the left.It is called "tail-fold"

32.Apply the tail-fold of the step #31.Prepare to turn the model over.

33.Turn the model over.Prepare to apply a mountain-fold

34.Apply the mountain-fold of the step #33.Prepare to unfold.

Step 16: 16

35.Unfold the previous fold.Prepare to apply a mountain-fold.

36.Apply the mountain-fold of the step #35.Prepare to unfold.

37.Unfold the previous fold.Prepare to apply another "tail-fold".

38.Apply the "tail-fold" of the step #37.Prepare to turn the model over.

Step 17: 17

39.Turn the model over.Prepare to apply a valley-fold.

40.Apply the valley-fold of the step #39.Prepare to apply a valley-fold and then tuck it under the front-most layer.

41.Apply the valley-fold of the step #40 and then tuck it under the front-most layer.Prepare to turn the model over.

42.Turn the model over.Prepare to smooth sharp edges