The kitty circle is 53 cm across and the whole is 50-ish cm across.
I am now thoroughly addicted and took it on the train and did some at work too. Business men in suits probably wondered where all of the fluff on their trousers came from. I tried to shield it with my scarf but... that's more because I get shy with the staring.
They're used to me doing things at work by now and cast me affectionate glances (I'm pretty well alone as a crafter there). Happy La!