Can you add a placeholder and edit the size of these fields?

At the end I've changed "Fecha de recogida" and "Fecha de entrega" by Jotform widgets because the previous ones were loaded very slowly. 

Can you add plaseholder in "Fecha de recogida" and "Fecha de entrega" and edit size of field the same of Propiedad actual and Fecha de recogida?

I feel for inconvenience and thank you for advance.

Please insert the CSS code below to increase the width of the field:

#input_192 {
width: 300px !important;
}

#input_193 {
width: 300px !important;
}

You can enable the "Show Text in Empty Option" in the drop down field. After enabling it, please enter the text in the "Empty Option Text" field. This will serve as the placeholder.

Hope that helps. Thank you.