Thanks so much, to all of you, for your input. It has all been extremely valuable.
I just wanted to make sure that I'm not being ripped off, and you guys have given me more than enough information to determine that I'm not.
prex, your insight concerning your measurements for a 4"x4"x1" N42 is...
I've bought neodymium magnets, from a particular source, over the course of several years. I often need the strongest magnets that I can get my hands on, so I've always ordered N52 neodymium magnets. Most of my magnets are 2" x 2" x 1" rectangular magnets, which are magnetized through the 1"...