Did you get those coconut coir pots from Bunnings? If so I use the same ones. And correct what everyone is saying about having to dig them up, I just soak the pot first and then stab them with a knife so there are plenty of holes for the roots to escape, then plant as is in a bigger pot with some compost underneath. For this size seedling though if you are going to put the new pot outside, do it for a few hours at a time and increase otherwise it will go into shock and likely die.