Tetra Slipover Knitting Pattern by Rachel Costello

Tetra Slipover

knitting pattern


The Tetra Slipover is an all-seasons, versatile vest that champions creative construction with simple stitches. Stripe it, colour block it or keep it neutral - Tetra’s minimal, modern silhouette is the layering piece every wardrobe needs.


NEEDLE SIZE: 4.5mm / 7 US

GAUGE: 18 sts x 36 rows

The Tetra Slipover is such a fun and engaging knit, that you just can't stop knitting it. The easy garter stitch with the exciting construction of the garment make for a great experience.

~ Marieke (test knitter)

The sectional nature of the pattern means there are easy milestones and the slipover just flies off the needles! I will DEFINITELY be making more!

~ Kat @Moomeeno (test knitter)

The garment construction was novel and kept the knitting process really interesting. Even though the twisted ribbing is slow, it really pays off in the end. The bust darts make the fit of this garment a dream!

~ Anni @anniveikko (test knitter)

Absolutely loved knitting the pattern! This is going to be a great staple transitional piece in my wardrobe for when it's not cool enough for a sweater but not warm enough for one layer.

~ Danna @Oldsoulathome (test knitter)


    Tetra is a technical, but super simple knit. Tetra is knit flat, in garter stitch (knit every row), and in quadrants. The first quadrant is knit from the shoulder down to the hem. Then stitches are picked up along this completed quadrant and the other half of the slipover is knit from the centre out to the underarm. Once the front panel is completed, the back is constructed exactly the same as the front, omitting the neckline shaping. The two panels are then blocked before seaming and stitches picked up for the neckline, armhole, and hem trims.

    This digital pattern includes printer-friendly, full written instructions for two views (cropped and a longer, high hip version), individual progress charts for each size, and modification details including a bust dart worksheet & complete written instructions for the darts.


    • Long-tail cast-on
    • Increases / decreases
    • Backward loop cast-on
    • Picking up stitches
    • Seaming
    • Twisted rib
    • Folded trim
    • Icelandic bind-off