They are all of good quality it seems. I love box chains they are much harder to break than regular chains and these were all a good length. I actually gave the 16" to my daughter her favorite locket chain had broken (it was not a box chain) I am thinking that this one will last longer and with her being eleven 16" is good for her. I like the 20" the best but believe it or not but the 30" looks good with some of my darker dressier shirts and dresses :) I am happy great product for a great price!