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the best baby onesie sewing patterns

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Here is my list of seven of the best FREE sewing patterns and tutorials for easy to make baby onesies and my favourite baby onesie patterns to buy. All the patterns are downloadable and printable.

Free baby Onesie sewing Patterns

The first two FREE baby onesie sewing patterns are from BluPrint (formerly Craftsy). Simply CHECKOUT and REGISTER FOR FREE to download the patterns. NO CREDIT CARD DETAILS NEEDED.

BluPrint streams over 1300 craft classes for an annual or monthly subscription fee. BluPrint currently has a special discount at a time when we could all do with saving money...


BluPrint has cut its annual subscription by 50%. This makes annual subscription just $39.99 / £34.99 to have access to 1300 expert-led video craft classes, including…

GET YOUR SUBSCRIPTION: Just use this link to preview a selection of classes and if you love what you watch sign up for an annual subscription with 50% discount.


This is a FREE one-size only (3-6 months) version of this baby onesie sewing pattern from Mamma Can Do It on BluPrint. The full version of the pattern can be bought on the Mamma Can Do It website. The pattern gives multiple options for a perfect fit. There are sizings for cloth diaper or disposable diaper. Plus long-sleeve and short-sleeve options or tank top. 

Sewing Level: Beginner. Age: 3 months to 6 months.

Download free one size only (3-6 months) pattern at BluPrint

Buy the pattern for newborn to 36 months at Mamma Can Do It

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This is a basic, beginner-level easy baby onesie sewing pattern from So Sew Easy on BluPrint. This easy to make baby kimono onesie is front opening, which makes it perfect for dressing wriggly little babies. This is a free printable baby onesie pattern (printable PDF pattern). Age: 3 months to 9 months

Download free pattern: So Sew Easy on BluPrint

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3. Simple Onesie pattern

Download this super simple free baby onesie pattern: Small Dream Factory

Simple onesie free baby pattern

4. Blue Stripe Onesie pattern

I love the simplicity of this, great for a boy or girl.

Download free onesie tutorial and pattern: Omi Creates

Baby Blue Stripe Onesie Tutorial

5. Rufflebutt Onesie pattern

Download free onesie pattern: All Free Sewing


6. free baby onesie upcycled cardigan pattern

Download free upcycled cardigan baby onesie pattern:

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7. Baby Ringer Onesie pattern

Baby Ringer Onesie by Shwin and Shwin. You can find this pattern in our Free Baby Patterns list post 

Free Baby Clothes Pattern


1. Ruffle Sleeve Onesie

This 2-in-1 ruffle sleeve baby onesie pattern by See Kate Sew is possibly one of the most gorgeous onesie sewing patterns ever! The onesie has a snap crotch and snap shoulder feature for easy dressing and diaper access! There is a plain version and also a ruffle sleeve version. Age: Newborn to 18 months

You can buy the pattern at See Kate Sew.

Ruffle Sleeve Onesie, Free baby pattern


This easy to use onesie pattern gives you multiple options for a perfect fit each time. There are two sizing options are available. You can also choose to make these onesies with long sleeves, short sleeves or into tank tops. 

Purchasing note: After purchasing the pattern you will get an email with a link to a PDF download. You can download the sewing pattern anytime from any computer. The Mamma Can Do It system will store the pattern for you too, so you don’t ever have to worry about losing it. PLUS any time the onesie pattern is updated, you will have free access to the updates. Age: Newborn to 36 months

You can buy the pattern at Mamma Can Do It.

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3. Duck Duck Go multi-use onesie pattern

This onesie pattern is actually several patterns all in one. In short, you can sew a whole wardrobe for you baby, toddler or pre-schooler from buying just this one pattern!

  • View A: Bodysuit
  • View B: Tee/Pullover
  • View C: Bodysuit & Tee/Pullover combo
  • View D: Dress or Peplum
  • View E: Bodysuit & Dress or Peplum combo
  • Short or Long Sleeves
  • Neckband or Hood

The pattern comes with a full tutorial and colour photographs in an easy to print PDF. The pattern pieces are computer generated and colour coded for easy cutting. Plus the pattern includes layers so you can just print off the size you need and an A0 format for printing at a copy shop. Age: Premature baby to four years old (4T)

Buy pattern at Peekaboo Pattern Shop on Etsy

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This easy to use pattern by Brindille & Twig on Etsy is for both a long-sleeve and short-sleeve onesie. The sewing pattern is for confident beginners. The pattern comes with a full sewing tutorial. The pattern includes layers so that you can print the size you need. There is also an AO format if you need a print shop copy. The tutorial also includes two binding techniques so that you can use the technique you are most comfortable with. It is suggested that cotton jersey knit is the best fabric to use. Age: Premature to 3-year-old toddler (3T)

You can buy the pattern at Brindille & Twig on Etsy

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BluPrint (used to be Craftsy) has slashed its annual subscription by 50% for a limited time only. This makes annual subscription just $39.99 / £34.99 to have access to 1300 expert-led video craft classes. Here are two of my favourites:

1. Little Sew: Nursery Design with Vanessa Wilson from Crafty Gemini

  • Classes: 10 classes, just under 3 hours of learning 
  • Level: Intermediate
  • Make: Changing pad cover, rocking chair seat and back cushions, nursery curtain and valance. 
  • Skills: Piping, ruffles, French seams, blind hems, pleats. Measuring and designing curtains. 
  • SEE THE CLASS: Little Sew Nursery Design

2. Kids Romper Revamp: Creative Pattern Adapting with Shelly Figueroa 

  • Classes: 12 classes, 2 hours 22 minutes of learning
  • Level: Intermediate
  • Make: Romper from Shelly’s ‘Zephyr’ pattern which can be adapted to create up to five looks, including a pants jumpsuit, separates and a sundress. Sizing from 18 months. 
  • Skills: Learn to measure children accurately, how to adjust patterns for a perfect fit. How to choose fabrics for kids clothes, when and where to use different types of interfacing. How to finish with sophisticated design elements like braided shoulder straps, button loops and hem ties that will elevate your clothes from homemade to handmade.
  • SEE THE CLASS: Kids Romper Revamp

There are 209 sewing video tutorials to choose from, at beginner, intermediate or advanced level. Take a look and see which courses would help you take your sewing skills to the next level

If you’re looking for more than a baby onesie sewing pattern, pop over to my super popular Free Baby Patterns post for a big list of gorgeous baby patterns, all of which are absolutely FREE!

Got a thirst for making more baby clothes for your baby or baby-to-be? We have a bunch of other baby patterns and sewing posts here:

Plus we have plenty of posts to help you through parenting your Baby – and if you’ve not given birth yet, we’ve got a growing bunch of Pregnancy posts.