Based on my previously negative experiences I have tested the socks out of the box and I pulled on the hand in order to slip on the tile floor. Lo and behold, it was as impossible as well.
My daughter is now 10 months old with their feet are still very small. Nevertheless, the socks fit well and we will also be able to still use a few months. Also, do not slip off the legs and my daughter she can not as easy to take off for themselves what they really love to make, but is not always desired. ;)
All in all quite wonderful non-slip socks! The colors and designs are also very beautiful.