The numbers on the inside 100 correspond the the Church's sizing on their site = 44 Italy or EU, 10 UK 11 US ---That said, PLEASE see the measurements we have provided.
I can't make out the size but they are 11 1/2" heel to toe inside with the tape flat.
4" on the widest part of the outsole.
I added photo of the inside writing for those who might be able to decipher it.
Gorgeous! Please note the measurement, as I can't be sure of the size other than that.