Is increasing the "spinner" box size a possibility?

Basically, that's it. I'd like to increase the input box size so that it is usable on a small phone. I managed to do that slightly, but the font size inside the box remains tiny. I know it's probably in the .css file, but didn't manage to find it. I'd be grateful for any pointers, thanks in advance.

I believe you are referring to this form: 

http://www.jotformeu.com/form/52648873879377

and I see what you mean

You can fix that by injecting this CSS codes to your form using this guide:

.form-spinner-input-td input{

padding: 1px !important;

height: 36px !important;

font-size: 24px !important;

}

I hope this helps. Let us know if you need any further assistance. Thank you.

Thank you very much, that was exactly what I needed!