I was just navigating through Lion Brand Yarns Web Site when I came across this cute envelope idea.... it is sooo simple.Here is the instructions as best as I can supply.
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per the instructions, the exact gauge is not important to this project
ENVELOPE SQUARE: Use white or cream colored or even pink yarn for the envelope.
Chain 26.
Row 1: Sc in 2nd ch from hook and in each ch across for 25 sts.Repeat each row till the piece measures about 6 1/2 in. (16.5 cm) from beginning.
Fasten off.
To make the HEART decoration...Use red or pink or what ever color you want.
Now chain 4.
Round 1: 2 dc in 2nd chain from hook, hdc in next chain, 3 sc in last chain; working along opposite side of beginning chain, hdc in next chain, (2 dc, slip st) in last chain.
Fasten off.
To FINISH...Fold Envelope Square into an envelope shape by bringing three corners together at center. Sew corners together. Sew Heart to joined corners. Weave in ends. To look like an envelope.
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Hmmm wouldn't a 'heart shaped yoyo' look cute in place of the crocheted heart?
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Perfect way to send a sweet Valentine to that someone special.
The Lion Brand site has some wonderful free crochet & knitting patterns.