Here is the first of my written up baby shoes patterns. I started with my favourite, and also the one that is freshest in my mind. As you can see, there is a slight mismatch between the boots themselves and their chosen name. They as yet have no buttons attached. I'm planning to add a velcro closure and sew buttons onto the tabs down the upper portion of the boot. I just don't have any suitable buttons at the moment, so you will have to use your imagination.
To make the boots as pictured above, download these two PDFs and off you go. Please note, I'm not a professional pattern writer so I apologise if I've missed anything important. I tried to be as thorough as possible and included plenty of photos.
Sizing wise, I'd guess these are about 3-6 month size. Again, I'm sorry if this isn't quite accurate. My son was a big baby, so my estimations of sizes are probably skewed a bit to the large size.
Good luck to anyone that finds and attempts these boots, I'd love to see what people come up with and any hear thoughts on the design and pattern and will endeavour to answer any questions as best I can.