Biggest caterpillar is 15 mm long.
Middle caterpillar has had another shedding of skin and is 7 mm long.
Smallest caterpillar is 4 mm long.
They're not walking around the plant as much as they might if it were Summer with lovely warm weather to keep them active, however they're eating lots and seem perfectly happy.
It's very cold here now, just as we expect June to be in New Zealand - even up here in the so-called Winterless North and cold temperatures slow caterpillars down a lot.
So far, so good, however.