5F (up from 4.5G in late November, 4G in early October).

I thought the existing hard shoes were getting a bit uncomfy for him, though I could still feel some space at the toes.

I resisted buying anything there and then, partly because Charles was very grumpy from having been woken up by the foot-measuring, and partly because I'm not sure we need a pair of hard shoes with the Robeez for indoors and the wellies I'm about to buy for outdoors. They do have several different shoes in his size with the flashing light when you walk, and I am deeply tempted. I wish you could get those in adult sizes.

Probably ought to wait for the next shoe size though.