Problem with Contact Form 7

I have added a contact form (7) to the this website http://roofer.colintonwebsitedesign.com/contact-us/
and as you can see the boxes are of various sizes and although it works well it does not look good.

Contrast this with the form I added to this website http://www.fionashousecleaning.co.uk/contact/
and you can see the difference.

Any ideas what the problem is. I have checked through previous topics and can’t see any issue from anyone else.

Thanks in advance.