I have 3 juvi's and a sling, I bought the sling sized 1cm, as you can imagine
I nearly lost it a few times....but now 8 months on it is approx 4-5cm
it molts approx once a month at the moment,
but they grow very very slowly, my juvi's are aprrox 4inches now and they are 3 years old...
so expect to be in it for the long term if you have a smithi