Baby Romper (Onesie) Knitting Patterns

Browse our collection of Baby Romper Knitting Patterns, featuring traditional romper, onesie, sleepsuit and all-in-one knitting patterns for babies and reborn dolls.

Our collection includes a beautiful range of baby romper knitting patterns, also known as onesie knitting patterns in the US, as well as sleepsuit and all-in-one knitting patterns. Many of our designs are suitable for babies from micro premature through to 9 months, with a selection also fitting 10–22 inch reborn dolls, making it easy to create comfortable, practical outfits for every stage.

Whether you are looking for a premature romper knitting pattern, newborn romper knitting pattern or a larger baby romper design, you'll find a variety of traditional styles to choose from. Our patterns include long or short sleeves, long or short legs, along with front, back or side fastenings, giving you plenty of options to create the look you want.

Some designs are perfect for relaxing weekend projects, while others feature beautiful eyelet lace, textured stitches or decorative yarns for knitters looking for something a little more detailed. Every pattern includes clear, row-by-row instructions, with all the calculations done for you, so you can simply relax and enjoy your knitting.

Looking for coordinating garments? Browse our Baby Cardigan Knitting Patterns, Baby Bodysuit Knitting Patterns or Baby Jacket & Coat Knitting Patterns collections, or return to our Baby Knitting Patterns by Clothing collection to explore every clothing category.

Whether you call them rompers, onesies, sleepsuits or all-in-ones, you'll find traditional knitting patterns designed for comfort, practicality and timeless style.