Free Knitting Pattern for a Baby Romper for a Boy or Girl

The free knitting pattern for a baby romper for a boy or girl back in the day would have been for a boy only.  Today, with the right color yarn, the little onesie is unisex.

By Jan — Unique Baby Gear Ideas • Updated October 23, 2025

Traditional neutral colors would be soft yellow, green or lavender.



The pattern would also be cute specifically for a boy in blue (navy or light blue) or pink for a girl and can be made in three sizes, 1 year, 1 1/2 years and 2 years.

Free Knitting Pattern for a Baby Romper

Regardless of which color works best for your project we recommend that our visitors always knit using baby soft yarn to avoid irritating a newborn's sensitive skin.


Here are 12 more of the top baby knitting patterns preferred by crafters.

This little knit romper is a basic style perfect for every day wear.

Materials, Yarn, Tools and Notions

Yarn Recommendations And Requirements: Two (2) ounces 3 ply non-shrink baby yarn

Tools: Nine (9) buttons, One (1) size medium crochet hook and two (2) Stitch Holders

Gauge: Refer to the chart found on the Free baby Hat Knitting Pattern page for proper tension/gauge for the yarn used for this knitted baby romper.

Unique Baby Gear Ideas has patterns for soakers, sleepers, booties and many other items to knit and crochet in our free pattern section.

About the Author

Hi, I’m Jan — the creator of Unique Baby Gear Ideas. I love helping expecting parents discover nursery décor inspiration and creative photo shoot ideas that make every stage of pregnancy feel beautiful. The suggestions I share here come from years of hands-on experience styling nurseries, reviewing maternity gowns, and learning what makes each photo session shine.

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