I bought these shoes in the 6-9mo size to save for my daughter when she gets a bit bigger, I also bought the 3-6mo size in another print and those ran a bit on the smaller side of the sizing, say the shoe would fit perfectly at the 6 month age but might start getting small at 9 months. I really love these shoes, they are really well made and I love that they are vegan compared to many soft soled shoes that look similar to this. Another huge plus to me is the soft terry cloth lining inside, it's great for baby feet! If you get the bigger size they have a soft rubbery sole which is great for babies just learning to walk, it's super flexible but seems like it would be non-slip compared to just leather on the sole. I received these shoes at a discount for my review, however all opinions posted are my own. I would gladly buy these again in other prints they are adorable and so well made!