ALL baby socks come off of my baby's rather large feet a few minutes after putting them on.  She has long feet, and she kicks more than your average baby.  These socks are the only ones that stay on, AND don't cut off the circulation from her ankles down (I have another type of socks that stay on, but they leave very deep indentations in her skin that always look so uncomfortable.)

She is 3 and a half months old, and the 3 to 12 month size fit her perfect, but they also look like she has some room to grow into them.

After I received a package of them, I ordered 2 more.  They're good ones.