Use a standard A4 or letter-size sheet
Place the paper flat on a clean surface
Fold the paper in half lengthwise
Crease sharply, then unfold
Fold the top two corners to the center line
Fold the new top edges to the center line again
Fold the plane in half along the center line
Fold each wing down evenly from the top edge
Keep both wings symmetrical
Add a small upward fold at the back of each wing
Make the nose tight and pointed
Press all creases firmly
Adjust wing angles slightly upward
Test throw with a smooth, level motion
Use minor bends to balance flight
Trim the wings evenly if needed