All these 7 free knitted baby sweater patterns featured have raglan sleeves and are knitted in one piece from the collar to the bottom.
A raglan sleeve is a sleeve that extends in one piece to the collar. The tell-tale sign is a diagonal seam from the underarm to the collarbone. It is a popular technique for knitted baby sweaters because it does not require seaming.
I have selected patterns that use different increase techniques. The yarn-over is the most common, the next is the M1L and M1R technique, and incorporating the increases in a panel. They also feature different stitch patterns like cables, eyelets, knit and purl stitches.
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Billie Baby Jacket

Marianna offers the Billie baby jacket in 3 different sizes. The little ribbing in the middle of the sweater gives the sweater a “waist” makes it looks like an adult jacket. So cute!
Free pattern at https://mariannaslazydaisydays.blogspot.sg/2017/04/billie-baby-jacket.html
Alison’s Helena Cardigan

Helena is a fairly simple lacy skirt-looking cardigan. The sweater enclosure is made up of knitted ties instead of buttons. This is a great child-friendly embellishment because no buttons will drop off and get swallowed.
Free pattern at http://www.knitty.com/ISSUEsummer08/PATThelena.html
Max’s Baby Cardigan

Max’s baby cardigan features a pair of single cables on the front of the cardigan. The pattern isn’t professionally written but everything is there. The sleeves can be knitted full-length or three-quarter long.
Free pattern at https://mariannaslazydaisydays.blogspot.sg/2014/08/max-baby-cardigan.html
Peter Pan Bubble Baby Cardigan

The pattern of the Peter Pan Bubble baby cardigan includes 2 versions: round and v-neck. There are quite a bit of seaming up here as you have to knit the back piece, the 2 front pieces, the 2 sleeves and neckbands all separately. I am not a fan of this type of construction but I do like the bubble stitch at the bottom half of the sweater.
Free pdf pattern at http://www.knitting-bee.com/wp-content/uploads/2016/04/Peter-Pan-bubble-baby-cardigan.pdf
Elsa Cardigan by Marie Piochon

Although the pattern for Elsa cardigan is written by a non-English designer, it was still quite well written. The designer said that it is more like detailed notes, which I agree with. I made Elsa using bamboo cotton yarn and I am quite happy with how it turned up.
Free pattern at https://www.ravelry.com/patterns/library/elsa-6
Sunnyside Baby Sweater

The designer Tanis Lavallee, wanted to design a little sweater that used up one or two skeins of yarn. She came up with two. Both have the same basic shapes except for different detailings. One is a lacy zigzag motif with a picot edge which is pretty for a little girl. The other one is a handsome rope cable paired with a garter stitch hem more suitable for a boy.
I like that she repeated the details along the button-bands and the raglan increases.
Free pattern at https://www.tanisfiberarts.com/blog/2011/04/sunnyside-baby-sweater.html
Knit Baby Jacket

Designed for Yarnspirations, this easy baby sweater is knitted in garter stitch. It produces a soft squishy sweater that does not curl. Instructions were given for 3 sizes: newborn, 2 months, and 6-12 months. It is worked in one piece from the neck edge down.
The pattern contains instructions for the bunny hat. Free pattern at https://www.yarnspirations.com/bernat-knit-baby-jacket-set/BRK0233-002246M.html
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Happy knitting
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