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Onesie Pattern

Format PDF (Download Only)
Author Mamma Can Do It
Price $6.50
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by Hardcastle, R
on January 29th, 2017

“Awesome pattern! I love the variety of sizes and the options available. I have not made it up yet but will be doing so very soon for my soon to be born grandchild.”

Sew fitted or comfy Onesies with this baby onesie pattern

This is a sewing pattern to make your own baby onesies.
Make them with Long sleeves, short sleeves or sleeveless (tank top).
The onesie pattern includes sizes:

Tiny Newborn
0-3 months
3-6 months
6-9 months
9-12 months
12-18 months
18-24 months
24-36 months

Each size has 2 patterns: one is for fitted sizing and one is for comfy sizing. The ftted size onesies are perfect if you want a nicely fitted onsie on an average size baby. The comfy size onesies are great for babies who have extra large tummys or thighs or just for the mom who likes the baggier style.

Also included in this onesie pattern are instructions for a short sleeve, long sleeve and sleeveless onesie.

Make these baby onesies with a regular sewing machine. However, if you had a serger, I have optional serger directions as well. No serger is needed though. The pattern is designed to fit babies from 0-36 months. It is accurate sizing with real babies.

This onsie pattern is the easiest available ANYWHERE. There aren't any unexpected or unexplained steps. Every step is very clearly detailed with a crisp image to help explain the step. You will definitely get it right the first time! The pattern includes helpful hints as well as great ideas on where to get fabrics for cheap or for free!

Sewing Level: Beginner!

This Onesie Pattern Includes:

Printable pattern pieces for 9 sizes (NB-36 months) for FITTED onesies
Printable pattern pieces for 9 sizes (NB-36 months) for COMFY fitting onesies
Tutorial to make onesies with sleeves
Tutorial to make onesies without sleeves (tank top)
Serger or regular sewing machine directions
Fabric suggestions & supply list
Very detailed binding instructions
Snaps or velcro instructions
Budget friendly ideas to help you save $$ on supplies
Helpful sewing hints & tips throughout the tutorial
Step by step directions with real life images for each step
100% Support from a professional seamstress


Contact me at for details on how you can make these onesies to sell!

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Knit fabric (think stretchy - jersey, fleece, etc)
OR use an old t-shirt!
Snaps or Velcro

by Hardcastle, R
on January 29th, 2017

Awesome pattern! I love the variety of sizes and the options available. I have not made it up yet but will be doing so very soon for my soon to be born grandchild.

by L. Hollems
on October 6th, 2016

I am a new sewer and just bought this pattern. I can't wait to make this pattern! I have started and so far so good! It's very easy to follow so far and have have lots of babies to see for!

by Smith, Linda
on July 20th, 2016

Such a great pattern - perfect for personalized baby gifts!~

by J. McDonald
on March 5th, 2016

Awesome pattern! Easy to follow instructions. I would recommend this pattern to others.

by McDuffie, Pat
on February 21st, 2015

Can't wait to try this pattern

by J. Hoyt
on January 31st, 2015

Love this pattern! Easy to follow, turned out great! I am expecting a new granddaughter AND a new great-granddaughter this spring, & will be making lots more of these soon! :)

by L. Pietrzak
on January 30th, 2015

Great pattern. Easy directions and it looks great. It is going to be great to able to embroider on the onesie then construct love it. I have my eye on a couple more patterns.

by clanderson1026
on January 26th, 2015

Onesies turned out unique and beautiful. Thanks for easy to follow instructions.

by PurpleEars
on January 15th, 2015

Instructions were easy to follow. The onesies looked like they were store bought, but with custom embroidery (that were added before stitching the pieces together).

by M. Boyd
on September 4th, 2014

Very easy to follow along. I have made several onesies using this pattern. I made one adjustment - curved the edges of the front and back flaps, doubled the leg binding and added 4" to that amount to get the total length. I prefer the more finished look that gives. Thanks for the great pattern!

by m. schumann
on May 30th, 2014

This is an excellent pattern. I've made a bunch, all three styles of the fitted onesie, and they turned out great! I tried a few other patterns and they turned out big and baggy, but these look like what you would buy in the store. I'm a beginner and thought the directions were easy to follow and loved the pictures. Thanks!

by Crumpton, Rosa
on February 10th, 2014

Great pattern

by Lee, Carrie
on December 26th, 2013

Made sewing with interlock seem not as scary! LOL. Came out great, love the pattern, will be my go to baby gift from now on!

by P. Lachney
on October 30th, 2013

Very easy. I've made several. I used Velcro instead of snaps.

by Nelson, Kim
on September 8th, 2013

It was easy to make. I like all the different sizes. I did a newborn and the biggest size and they seem pretty true to size.

by CustomCreations
on August 21st, 2013

LOVE It, use it to up-cycle old shirts!

by j. badger
on June 11th, 2013

Easy to do, fun, outcome is great! SO much better than store bought! lol You have to try it!

by S. Hoffman
on June 9th, 2013


by Cohen, Lachen
on May 5th, 2013

This Pattern is such a necessity. Can't wait to make ton's of these.

by Bogdajewicz, Anita
on May 3rd, 2013

I'm very happy with this and can't wait to make tons of them! thank you! Anita

by Kristy'sCraftyCloset
on April 22nd, 2013

Another baby gift, so I cannot comment on fit. But it is well written, goes together quickly and I LOVE having the different options.

by nursecari
on April 8th, 2013

First off, I had problems getting this to print and this designer was so awesome!! Quick communication and was extremely patient along with the websites person. After all of this was figured out, I was able to make this with no problem and it turned out great! Highly recommend this pattern. Thanks so much!

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