Idk but mine hates me and didn't open for months.

You might check if something is wrong then! Maybe pests, light problems, root problems

It varies! Mine has taken anywhere from a few days to a few months.

Thank you I didn't know it could take months.

It should take 1-2 weeks. If it's taking longer I would say you have light or humidity issues. This is my most recent leaf on my Albo (small form):

For mine it's 12 days from the moment the tip pokes through the first time to being fully open. If there is something wrong it might take longer...

Ok ill see what happens in 12 days, thank you.