stop customers entering more than 30 character for any field in Shipping and billing at checkout

[Bio_scott]

During our order entry process we have First Name, Last name, Street Address 1, Street Address 2, City and State. I would like to limit the amount of data that can be entered into these fields. I was able to setup a max length for Street 1 and Street 2, but using the filed and adding MAX length to City and State does not work. Something else is over-riding, when I inspect using Google chrome it show that the first name and the last name are each setup to have a max length of 255. I have tried some different form/files to adjust these and have not had any luck. I do not have customer attributes in the Admin for Magento and have turned to your special experts, Please advise on any possible resolutions...

Community Edition 1.9

Ultimo Theme

Thank you

[Bio_scott · Accepted solution]

I was able to fix my situation.

We used the files in the Ultimo Theme.

/app/design/frontend/ultimo/default/template/checkout/onepage/shipping.phtml

/app/design/frontend/ultimo/default/template/customer/widget/name.phtml

/app/design/frontend/ultimo/default/template/persistent/checkout/onepage/billing.phtml

added the MAXLENGHT variable.

[iankitraja]

I can't find the said file location in magento 2.2. Can you tell me the exact location?