My son has a fairly large head and this is one of the only cap I could find to fit him when he was little! It was best around 3 months and lasted ages - good, stretchy material. You can fold the bottom up when they are tiny and then just leave it unturned as they grow, which means it lasts longer than some on the market. The ACU digital design was my fave! Looks just like the air force uniforms, which is what I was after.