Tenacious turtle is quite a life-like turtle. The pattern calls for fingering weight yarn, but you may use any weight, bearing in mind that you will need more yarn if you use thicker yarn, and that the final size will be quite a bit bigger. Yarn that includes at least 50% wool will hold the shape better. I used Noro Kureyon sock yarn color 217, which has long colorways. If you use a similar yarn (approx. 400 yards/100g) and US size 4 (3.5mm) needles you will need approximately 310yds/77g yarn.

This pattern is written for experienced level knitters. An adventurous intermediate may want to give it a try but it may have some techniques that intermediate knitters are not familiar with. You will need to know how to do: wrap and turn (w&t), knitted cast-on, Kitchener st closure, 3-needle bind-off, circular knitting on dp needles, Picking up stitches - LOTS of picking up stitches, especially with the head.