I was inspired by an necklace I saw at dawanda.com. This necklace looks best in leather,but you can also use felt.
1
First make the love letter. Cut out a rectangle out of your white material and a heart out of your red material. Glue or sew the heart on the letter.
2
Cut out a square for the envelope.Turn it like this.
3
Fold 3 corners to the middle.It should already look like a envelope.
4
Glue it all together!
5
Attach a chain or ribbon to the love letter.Finished!