How long should a 12 month old be napping for?

my 12 mo back then have 2 naps a day. First nap usually 1hr. Second nap about 30-45mins.

My boy naps about 2 hours during noon. And sleeps at 8pm till 8am the next morning.

First nap about 45 mins to an hour. Second nap about 1 and a half hours.