I based the size of this cover to fit a Chicco Keyfit 30, but I think it would likely stretch to accommodate most brands of infant car seats. One of the best things about this project is that it's multi-purposed - it can also be used as a high chair cover, nursing coverup, or shopping cart cover. It folds up to a compact, lightweight, portable size so you can always have it on hand in the diaper bag.
Ok, on to the tutorial!
DIY stretchy car seat cover
Materials needed:
- lightweight stretch knit fabric - fabric that has a lot of stretch to it works best
- coordinating thread
- scissors
1.) Start by prewashing your fabric. Although I don't think stretch knit will shrink too much, it's a good practice to always prewash everything before you sew.
2.) Cut your fabric to 29" tall by 63" wide, making sure that the width is the stretchy part! note: if your car seat is larger than a Chicco Keyfit, you may need to cut your fabric a bit wider.
3.) Fold fabric in half width-wise (see photo below) and lay flat so fold is on left, and fabric is wrong side out.
4.) Stitch up right side of fabric using a zig-zag or stretch stitch if your machine has one. (Ignore the pins in the photo below for now, I am about to explain those...) Your fabric should now be in the shape of a tube with the top and bottom being the open part.
5.) Keeping fabric wrong side out, lay your fabric flat again. Measure and pin the corners as I did in the photo below, 8" over from each side and 14" down from the top. Put a pin in each of those locations and then run pins between them, making a triangle shape. I used a marking pen and straight edge to draw a line first, then inserted my pins along the line.
6.) Repeat for other side.
7.) Sew along the pin lines, again using a zig-zag or stretch stitch. Now is a good time to mention the walking foot. I recently purchased one for all the knit fabric projects that I am in the process of making, and let me tell you - it is a game changer! A walking foot helps to feed the fabric evenly on top and bottom, avoiding the annoying bunching that can otherwise happen when working with knits. I highly recommend one if you plan to work with this type of fabric often, they run only about $20 at JoAnns.
8.) Using a rotary cutter (or scissors), cut off triangle of fabric that you just sewed. Repeat for other side. note: don't cut off the stitched line that you just sewed!
This is what it should look like at this point:
Hey, guess what?! You are done! That's how incredibly easy these are. Turn it right-side out and pop on your car seat! The small hole is at the top and the larger hole is on the bottom. There is no need to hem the top or bottom because this type of fabric will not fray.
See how stretchy it is? So easy to peek at baby!
I was just a tiny bit sad that I had used up every inch of this fabric that I bought without making a baby hat, which was this materials original intended use. Well, I had used up almost every inch... I realized the two cut off triangles could be sewn into a piece large enough for a newborn size hat!
Now, I can say that I used up every inch....
This cover (and hat!) cost only $10 for the fabric, about a third of the price of a ready-made one you might buy online. It only takes about 10-15 minutes to sew up and would make a great gift as well. If you make this tutorial please let me know, I would love to see pictures and know how it worked out for you! Here is a picture I found on Pinterest showing how else you can use a stretchy cover like the one I made:
happy sewing! :)


























