Stentor coeruleus

Stentor coeruleus Amigurumi by ButterflyLove1

What is Being Made

This downloadable knitting pattern creates a Stentor coeruleus plush toy, a small stuffed microorganism approximately 5 inches (12cm) in length. Designed by Dawn Finney, the Stentor coeruleus is a single-piece knitted amigurumi that captures the form of this fascinating ciliate microorganism. The finished plush can be customized with plastic toy safety eyes for a playful appearance or left plain for a more scientific aesthetic.

Techniques Used

This pattern employs fundamental amigurumi construction techniques suitable for beginner knitters. The entire Stentor is created as a single continuous piece of knitting rather than assembled from multiple components. The key technique involves working to a deliberately tight tension—using needles two to three sizes smaller than the yarn's recommended needle size—to create a densely woven fabric that prevents stuffing from showing through the knit. For example, if your yarn recommends US5 needles, you would use US2 needles instead. After completing the knitted piece, you will stuff the form, sew it closed, and add embroidered details to define features on the surface.

Stitches Used

The pattern utilizes basic knitting stitches accessible to beginners:

• Knit (K) — the fundamental knit stitch
• Purl (P) — the basic purl stitch
• Stocking stitch (St st) — alternating knit and purl rows to create a smooth, classic knit fabric
• Increase (Inc) — created by knitting into both the front and back of a single stitch to add stitches and shape the form
• Knit together (Tog) — decreasing stitches as needed for shaping

Materials and Gauge

This pattern is designed for DK weight yarn in blue-green tones appropriate to the Stentor coeruleus microorganism. You will need approximately 10-15 grams of yarn per plush. The pattern specifies working to a tension of 32 stitches and 43 rows over a 4-inch (10cm) square using US2 (2.75mm) knitting needles or needles sized according to the tension guidance provided. Additional materials include plastic toy safety eyes (optional), fiberfill stuffing for the amigurumi form, and embroidery thread for adding surface details.

Difficulty Level

This pattern is rated beginner-friendly, making it an excellent introduction to amigurumi knitting for those new to the craft. The single-piece construction eliminates the complexity of assembling multiple components, while the basic stitches required keep the project accessible.