You can get the free version of this pattern on my blog here:
https://www.stitchandhustle.com/free-patterns/mammoth-turtleneck-poncho-free-crochet-pattern

This poncho is in Happily Hooked’s Pattern Pack Pro March 15th publication.

http://bit.ly/PatternPackPro

This pattern is written for Adult Woman size Extra Small/Small. (Sizes Medium/Large, 1X/2X, 3X/4X in parentheses)
Shown in Medium/Large Size modeled on 5’2” model with 36” bust & 18” of positive ease

This poncho is worked from the top down.

First, the collar is crocheted sideways and seamed.
The body of the poncho is worked down from the side of the collar.
Great beginner pattern!