Wren Undies Knitting Pattern – Digital PDF, Knit Bikini-Style Underwear

Inspired by the low-rise bikini underwear worn and loved across decades, the Wren Undies reimagine an everyday essential through the lens of handknitting. Light and minimal, they are designed with a timeless fit that feels as luxurious as sleepwear and as practical as a cozy base layer beneath skirts and dresses. Worked in soft merino wool for natural stretch and next-to-skin comfort, they carry a sense of intimacy and care, crafted slowly for everyday wear.

The pattern balances simplicity with thoughtful detail: a stockinette body shaped with ease, a ribbed waistband for gentle structure, and just one small seam at the crotch. Optional finishing touches, such as sewing in a cotton gusset & crocheting elastic thread at the waistband, allow you to refine the fit to your preference.

Skill Level: Adventurous Beginner / Intermediate

Format: Instant digital PDF download (no physical product)

Yarn: Fingering weight merino wool (sample knit in Woolfolk TYND), chosen for softness and natural stretch

Construction: Knit in the round with a stockinette body and 1x1 rib waistband, finished with one small seam

Options: Sewn-in cotton gusset, crocheted elastic waistband for precision fit

Sizes: Nine sizes, accommodating hip circumferences from 34–51 in (86–130 cm)

Each PDF is carefully formatted for printing as a booklet, offering a tactile, workbook feel as you knit. Your file will be available for instant download upon purchase.