To crochet this potholder as shown, you’ll need two different yarn weights.

For the body of the potholder you’ll need worsted weight cotton yarn in two different contrasting colors; for the snowflake applique, you’ll need a lighter weight of cotton thread or yarn. I’ve worked this potholder several times and have successfully used size 3 cotton crochet thread (Royale Fashion was the brand I used, but feel free to use any comparable crochet thread.) I also used Knitpicks Simply Cotton Sport organic yarn to crochet the snowflake applique. That’s what you see pictured here on this page.

I imagine you could also use embroidery floss to crochet the snowflakes, although I haven’t tried that yet.

If you just want to crochet the snowflake applique, that’s available as a separate pattern:

Winter crochet snowflake applique