The majority of this pattern is the same as my Granny Square Pop-Over pattern. If you already have that one, you can find the pattern for the Christmas tree square for free on my blog

Tis the season to be cosy and warm, merry and bright, and stylish to boot.
As versatile and customisable as the original Granny Square Pop-Over with a cute, festive tree for the winter season.
So quick to make, you can hook them up for the whole family to wear to the tree lighting ceremony, or to a winter market for some hot chocolate.
Wherever you wear yours, you’ll feel snug, smug, and suitably seasonal!

Sometimes you don’t need the bulk of a jumper underneath your jacket, but still want something a little cosy, which is why pop-overs are perfect!
Whether you wear yours as a warming vest over a shirt, or peeking out from beneath your winter coat, you can feel cosy and Christmassy in your seasonal crochet cover-up. Avoid those tropical moments in overheated shopping centres, and those brisk chills on your neck in the woods, this versatile vest will be your go-to for all those in-between weather days.

This is a made to measure pattern so you can use any yarn, fibre and hook you have to hand. Meterage will vary greatly depending on your chosen size and yarn, I used approx. 350m to make my size M aran sample and approx. 300m for my chunky one.
Pattern is also available for free on my blog.