Baby CardiganIT’S A BOY! We are so excited. We honestly were excited either way but knowing we’ve got a little guy joining us in a few months makes it seem that much more real. I held off on making baby things partially because we moved and were gone so much, but also because I didn’t want to make dresses if we were having a boy. The first project on my boy list was a baby cardigan. Aren’t they just to die for? I can’t wait to cuddle my little guy in this!  I wanted to test my hand at sewing on knits, something I don’t have much experience in. And, I still believe why buy something when I can make it. I knew I could buy one off Etsy but I couldn’t pass up the chance to give this a try. This project was not as hard as I anticipated and in fact I enjoyed it so much that I spent the rest of the week sewing on knits making things for my little guy. Give it a shot it really was so much fun to make!

So I found a long sleeve onesie that was priced at $2 and bought some rib knit from my local fabric store. It’s hard to pass up a $4 project. You only need a couple of inches of width and the length should be plenty to go around your onzie.

You will need:

  • Baby onesie
  • 2-3″ of rib knit (actual length determined by your onesie see step 3)
  • ballpoint needle
  • 3-4 buttons
  • thread


Step 1: Mark your Onesie

Baby CardiganI created my line from following the neckline at the shoulder creating a V-neck even with the bottom of the arm holes. I then drew a line from the V of my neck to the bottom of the front of the onesie. Because of the snaps at the bottom I made a slight curve to end between the snaps instead of centered on them.


Step 2: Cut into Cardigan shape

Baby CardiganCut along the lines you drew to create your cardigan. I cut all the way around on mine because sewing the rib knit creates a new finished edge. If your onesie has the splits at the shoulder do your best to just create a smooth curve, not cutting off the edging across the shoulder seams.


Step 3: Cut Contrast Edging

Measure along the edge of your raw-cut edge (from step 2) from one end around the neckline to the other end. This will be what creates the cardigan and allows you to button it. As you sew it in place you will stretch it slightly so the length you will need is approximately 2/3 of what you actually measured. However I never want to cut it too close while sewing so I start with the measured amount and just cut off my extra at the end.

Baby Cardigan

Cut rib knit contrast to desired length (about 2/3 of measured length plus a little extra for wiggle room).  As far as width goes I cut my fabric 1 1/2″ wide so that folded in half it creates a 3/4″ edging. I’ve seen some with a slightly wider width which are so cute as well so if you want a wider edging I’d cut it 2″ wide.


Step 4: SEW!!!

Fold rib knit in half width wise to create your narrow edging. Press to help it stay in place.

Place folded rib knit edging to right side of onesie, matching raw edges. (note that because it’s folded you should have 3 layers).

Baby Cardigan

Sew along raw edges using a stitch suitable for knits. You are going to want something that allows the fabric to stretch without popping the seam. On my machine I used stitch #8 but stitch #3 would work as well.

Baby Cardigan

Remember to change out your needle to a ballpoint needle before sewing. The trick to sewing ribbing on is to slightly stretch it as you sew it to the main fabric, in this case the onesie. The idea is that as you sew you take 2 inches of the rib knit edging and stretch it to equal 3 inches. Take 2 inches and make it 3. To finish bottom of onesie fold under raw edges and close (I just hand stitched mine).

Baby Cardigan

Press along the seam to lay edging flat.

Baby Cardigan


Step 4: Buttons

Decide which side of the edging you would like to lay on top – this will be the side with the button holes. The side that will lay underneath will be where you attach the buttons.

Baby Cardigan

Decide on your placement of buttons, evenly spacing them throughout. To find the length to make your button hole measure the length of your button + width of your button + 1/8″.  This gives you enough room to slip the button into the hole, but doesn’t make it too big. Sew button hole according to your machine’s directions.

Baby Cardigan

Sew buttons in place by hand using a secure stitch.

Baby Cardigan

I can’t wait for my little guy to arrive and to dress him up in this cardigan with a shirt underneath and cute chubby little legs poking out. Between now and November I will  be making a few more of these. I think they would be darling paired with a cute little bow-tie, maybe that will be an upcoming project.

Baby Cardigan



Here’s a little about me: I usually don’t buy things that I could make. I like to read and learn. I have dreams of being a mom, living in foreign countries, and trying new things. I take a ton of pictures. I collect rocks from the places I’ve been. I’m trying to learn French. I like to eat. I’m a Mormon.

Leave a Reply

Your email address will not be published. Required fields are marked *