These socks were a little larger than I had expected, but have worked out really well.  Baby's feet are too large for the 0-3 months socks, but many of the next size up are huge.  When I ordered these it wasn't totally clear what age they were intended for, but the package said 6-18 months when I got them.  I thought that meant they would be huge, but after a washing they are actually great.  He has room to grow, but they are shaped so well they don't fall off of his feet.