Depends. If you want to read every plaque and bask in every image I imagine you could stretch out two days. I think the average person will get through the museum in a few hours (I've been twice with different groups and each group finished in about 3 hours) and the actual Hall in about 20-45 minutes. The museum really isn't that big (2.5 floors...I would liken it to the Gugenhiem in size) and several sections are really only catering to a certain fandom (there's a section for the current year's world series winner and a section of lockers for each team with various artifacts). Again, it depends on the group and how you do museums. I would suggest discussing with the group how they like to do museums before getting there.
I was there for nearly 5 hours and feel like I flew through it. I would recommend a full day or 2nd visit if you're a real baseball fanatic
A solid day. You could make it two.
Two to three hours for us.
Two hours, done.
Depends how interested a person is in each exhibit. I was in a time crunch but could have spent most of the day there.
I agree. For sure a whole day, two if you want to explore Cooperstown as well.
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