Babies grow so quickly! Here's an idea that I used for the design of the original pants, but could be used to add a few inches to the baby pants. In general, the width of the baby pants are ample for quite a while before the next size is needed, so the first sign that clothes are too small is the pull from the foot (especially if the pants have a complete foot) to the crotch - making it impossible for the baby to wear. If the item is a onesie, the foot can be cut off and a new open cuff added. If the pants already have a nice cuff, the inches can be added in the leg and the bottom part with the original cuff, sewn back on.
Sewing, machine embroidery, paper-craft, and stamping are my hobbies. At the moment die-cutting paper craft is my favorite, and I am sharing my projects with you on this website.