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The Thermal Stitch is by far the best stitch (that I know of) for a potholder. It’s quite dense and thick – it’s basically double the thickness of a normal single crochet. It’s perfect for a potholder or anything that needs that extra thickness.

When trying this stitch for the first time, the trickiest part is to find the right stitch that you need to crochet into. The whole pattern consists of single crochets that are worked into the back loops of current and previous rows together. That’s what creates the thickness.

If you’re trying this stitch for the first time, it might take a little longer the first couple of rows as you need to pay extra attention to the stitches. But after a few rows the stitches become more prominent which will make it super easy to work with!

Scroll down for the free pattern.

Thermal Stitch Pot Holder

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Pin it to your crochet board for later use!


Yarn: any 100% Cotton (Lion Brand has some nice coloured cotton bamboo yarn)

Hook: 3mm (I’m using this set of hooks here)


This potholder measures 17cmx17cm (6.5”x6.5”)


Ch = chain

Sc = single crochet

St = stitch

Th st = Thermal stitch 

Crochet Pot Holder Pattern:

Ch 35 (or any number if you’d like to make it bigger or smaller)

Row 1: Sc in the second chain from the hook and across (34 total). Ch 1 and turn it in a way that you still see the same side you were just working on, see picture below.

Row 2: Insert the hook into the back loop of the very first stitch and into the parallel loop from the chain row (refer to picture). Work a single crochet as normal through both of those loops. That’s one thermal stitch.

Thermal stitch

Row 3-36: Repeat Row 2. Always work a single crochet into both, the back loop and the parallel loop of the row below = Thermal Stitch (watch video below)

Thermal Stitch tutorial

Last Row: The only difference here is that this time instead of inserting your hook into the back loop – insert your hook under the ‘v’ (both loops – as a normal SC) and the parallel loop from row below. You’ll have four loops on your hook, see picture below. This will create a nice finish.

thick potholder crochet pattern

Loop: After you finish your last row, chain 20 to make a loop.

crochet potholder pattern

Work a Sc into the same stitch. Then do a couple of slip stitches along the side to even out the finish. Weave in ends.

crochet potholder loop
crochet potholder loop


Let me know in the comments what you think of this pattern and what else you could use it for!

Try the Half Double Crochet Thermal Stitch Potholder – I really like the texture of it!

Half Double Crochet Thermal Stitch Potholder

And here is another pattern (Spider Stitch) that is extra dense and could be used for pot holders or washcloths.

potholder free pattern

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