how large is the lollipop?

These pops a a little bigger than a dum dum, they are minis so they are not as big as the ones sold in stores. They are the perfect size for hand outs!

how to determine if sucker is milk free also beside peanut free?

Both the normal and cream ones are nut free. The cream ones contain milk and the non cream ones are made on the same equipment as the cream one so it could be cross contaminated.

Do they still taste funny?

no these are the best cotton candy lollipops out there in my opinion, idk if you're in america or not but their the same ones they always have near the checkouts at walmart

Do you happen to know what the expiration is on these lollipops? I am going to need for April 2015, and don't know if I should order now or later

I ordered mine in March 2012...and my kids are STILL enjoying them! they still taste, look, and smell fresh :) yes...it's Oct 2014...so we have had these lollipops for 2 1/2 years.