Hi mate sorry been so sloe to reply. Been so busy. Mine are standard size letters .It is the reverse printed style you want but I can't seem to find where I got it from.
You've got a keen eye! It was a shade of yellow because it's going to be rendered and painted a creamy shade of yellow, but that didn't stand out very well. So I opted for green instead, as the doors are going to be an olive greeny colour