Baby Sleeping Sack: A Tutorial

At the start of this winter my little boy was waking up during the night cold, even though he had warm footie pajamas on.  Sewing mommy to the rescue!  Those Halo sleep sacks were too expensive at $25-$30 per sleeping bag.  I needed at least 2, preferably 3 to keep in the wash rotation. I came up with a double layered flannel sleepsack with an invisible zipper.  My favorite part was picking out the adorable fabrics!

You will need:

1 Yard Flannel Print for outside

1 Yard Flannel Inside

Thread to match

1 22″ zipper (the no-see kind)

1 snap

Faux button if desired on snap closure

This is a very simple project.  Cut out your outer fabric and lining.  Use a shirt or onesie your little one wears to trace the neck and arms.  The back of the sleep sack should have a higher neckline than the front.  Take baby’s height and add about 5-7 inches at the bottom and make the bottom fan out so they can stretch their little legs at night.  [My 10 month old was about 26″ tall.  To give you an idea of a 6 month old height, my guy was 23″, but he has lots of tall genes to pull from…  He is a year old now and I’ve made longer ones for him than the 10 month sizes.]

Your front panel will be split in two for the zipper.  Give yourself a little more seam allowance for the zipper installation.  Then put your two front panels together, right sides facing and serge along the zipper edge and all the way around the neck and down to past the arm holes, leaving the outer edge and bottom open.  Turn these right side out and press your seams.

Then Do a similar thing for the back panel, sewing the neckline and arm areas together (leaving the sides and bottom open), sewing right sides facing, and then turn right sides out.  Press your seems open, especially the ones where the Zipper will be placed.

Then Install the Zipper before sewing the front and back panels together.

Once you have installed the zipper, place the front and back panel together, right sides facing.  Serge around the outside and bottom, avoiding the arm and neck holes of course.  Close the gap below the zipper between it and the bottom of the sack with a zigzag stitch on the inside of the bag.  Zigzag stitch the shoulder pieces together.

Then turn the whole thing right side out.  If you want to add the snap closure over the top of the zipper, do so last so you can adjust where the best placement will be for baby’s comfort.

Thanks to CraftGossip for Linking to my post!

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  • http://thesecretgarden.typepad.co.uk/ Rebecca

    This is exactly what I was looking for – thank you so much! :)

  • Iris

    I just made one using this tutorial and it turned out really good! I will be making a few more soon.
    Than you so much for taking the time to post this.

  • Sammi Johan

    Great tut! I love that you use flannel cotten and not the polyester fleece.

  • Tina Palazzolo Pankow

    love this…..really cute….blankets in the crib are dangerous…

  • Tayva

    GREAT tutorial!!! I can’t wait to get scissors into my new flannel to make my daughter a few of them! Keep up the creativity!!!

  • Stephanie

    I used this to make sleep sacks for our first little guy and now I’m making more fo the new one on the way! Thank you for such an easy tutorial!

  • LibMindcom

    Wonderful! If you post pics on a sharing platform, please post here :)