To modify the width of the text box displayed with Other type questions, add the following to your themes custom.css file:
.input-width-500 input[type="text"].form-control {
width: 500px;
}
@media (max-width: 768px) {
.input-width-500 input[type="text"].form-control {
width: auto;
}
}
And then for questions that you want this to take effect, open the Display panel, and in the CSS Class(es) field, enter: input-width-500
