Freshen up a simple white onesie with a vintage-lady applique and lace frame. This DIY onesie how-to from See Kate Sew is a 10-minute craft that makes a great baby shower gift or personal touch for your little one's wardrobe. By choosing a fabric with a natural "frame" (like this retro lady), it's simple to cut out fabric with an extra quarter-inch all around to applique. Kate pins the lace on to secure the vintage-chic photo frame while sewing around the curve.Get the DIY onesie how-to at See Kate Sew. Also, check out this baby bonnet knit pattern for a sweet vintage look that pairs well with any vintage-inspired look for your baby.
Here's also a DIY onesie tutorial from The Crafty Gemini.