contact form in widget area

Hi everybody, i use theme suffusion and i′ve insert contact form in sidebar but container extend beyond the edge of the sheet. i saw some video tutorial and than i′ve made some changes. i input there 25/ – you can see.

<p>Your Name (required)
[text* your-name 25/] </p>

<p>Your Email (required)
[email* your-email 25/] </p>

<p>Subject
[text your-subject 25/] </p>

<p>Your Message
[textarea your-message 25/] </p>

<p>[submit “Send” 25/]</p>

than every containers are ok, only text area extend beyond the edge. please could you help me, how can i fix it? thanks a lot

https://www.ads-software.com/extend/plugins/contact-form-7/