I would like to increase the size of the text box in the input table field

Hi Guys 

I would like to increase the size of the text in the input table. also increase the width of that text box please 

I think you have already figured this out. I see the textbox are now wider than its normal size. Let us know if you need further assistance with this. 

No I haven't. Aplogies I am probably using the wrong words. I want the column that contains "52. Belching or gas within 1 hr. of a meal" to be wider" to be wider

If you want to make wider that column then you have to inject CSS code in your form. You can add this code into your form's CSS:
table tbody tr th:first-child {

  width: 225px;

}

You can check how to inject custom CSS code here.
I have cloned and worked on your form so you can also clone my form and use it. Here is my form.
If you don't know how to clone forms, please check out it here.

If you need anything more I'd be glad to help you out.

The custom CSS codes given by shushanik would make all sizes of the input table fields in the form wider. You should target the ID and the header, please use the below custom CSS codes:

#id_36 .form-matrix-row-headers {

    width: 350px;

}

Smashing you guys thanks a mill, got sorted