Scaling Amigurumi: a crochet investigation
I’m often asked how to scale one of my amigurumi patterns up or down by a specific amount. It’s hard to answer that without relevant data, so that means it’s time for another crochet experiment – yay!
Want to skip straight to the results? Jump straight to the Scaling Amigurumi to Any Size tutorial.
Method
I made 8 versions of my Tiny Whale pattern, ranging from the largest 25mm hook I own down to the smallest hook I felt I could manage (0.9mm), and choosing the most appropriate yarn size for each hook.

Of course, it’s possible to crochet outside this range – massive 40mm hooks exist (or you can crochet using your whole hand instead of a hook!), and some talented people are able to crochet with sewing thread and a 0.4mm hook – but I had to set some limits for my experiment…
The three dark blue whales in my photos mark these limits: largest, smallest, and the standard size (made with worsted weight yarn and a US E/3.5mm hook).
I’ve named all eight sizes so we have something to refer to throughout this post, from largest to smallest (and top to bottom in the photo above):
- Extreme Amigurumi
- Giant Amigurumi
- Mini Giant Amigurumi
- Large Amigurumi
- Standard Amigurumi – regular amigurumi!
- Small Amigurumi
- Mini Amigurumi
- Micro Amigurumi
The difference in scale is incredible – one stitch of an Extreme Amigurumi whale is larger than an entire Micro Amigurumi whale!

And here’s a top-down photo of all 8 sizes (this is a single photo so the scale is exact; the only editing I did was to add the pink spiral for clarity):

Look for the three dark blue whales to see the differences in size between the Standard size and the Micro (smallest) and Extreme (largest). Isn’t that something?!
Calculations
Time to quantify those differences. To get an idea of the scale change, I took four measurements from each of my whales:
- the average width of one stitch (sampled over several stitches for higher accuracy)
- the average height of one round (sampled over several rounds for higher accuracy)
- the overall length of the whale
- the width of the whale at its widest part
Then, for each whale, I compared each measurement with the same measurement on my standard sized whale (made with worsted weight yarn and a US E/3.5mm hook). I used the average of the four comparisons, rounded to a nice number, to give me an approximate overall scale factor for each amigurumi size.
There’s a lot of variability here – not only in the numbers I measured from my samples and the accuracy of my measurements, but in the difference between specific yarn and hook combinations and the individual crocheting style of each crocheter – so a rough conversion factor is the best we’re going to get.
My scale factor is not intended to be an accurate number, but a rough idea of the size difference you can expect from scaling up or down.
Results

UPDATE: Note that I’ve replaced my original ‘Mini Giant’ scale that you see in this post with the ‘Double’ scale, which, although it isn’t as large at 2x scale, makes for a better amigurumi toy, with sturdier fabric and smaller gaps between the stitches. (For reference, Mini Giant used the same yarn as Double with a larger L hook, to make a 2.4x size amigurumi.)
I’ve created a table of results that you can use as:
- A starting point for figuring out how big your amigurumi will be when you use a different yarn and hook
- A reference for the yarn and hook sizes to choose to make an amigurumi of a specific size
I hope you’ll find it as helpful as I do!

















































































