Chicago question - size of property manager sign requirement

[Leslie Voegtlin]

Anyone that happens to be from Chicago.... do you know what the requirement is for the "property management" sign on your rental building.

I had a city inspector tell me that the paper in the window with my name and number was not sufficient.  He said it has to be a certain size and have my name, number and address.  If he told me the size....I forgot what he said b/c I was nervous about passing the building violation that he was there checking.

I wanted to order the official sign, but I can't find the measurement requirements anywhere.

Thanks in advance.

[Matthew Olszak]

@Leslie Voegtlin

https://chicagocode.org/13-12-030/

I haven't seen a specific size listed/required, just that its reasonably large enough to been seen from the sidewalk (public way).