[Theme: Responsive] Cannot change table, td, or tr height/width.

I am using the Responsive theme and have been loving it so far. I’ve uploaded some XML data through the WP Import All into a table and it’s working perfectly! However I can’t seem to change the height/width on the table itself, the table data or rows. I’ve created a child theme and all my other CSS is working fine. Here is the code I have. The 40px is just a random number to test if it is working.

table{
	text-align: right;
	border-collapse: collapse;
	font-family: sans-serif;
	font-size:9px;
	width: 40px;
}
th{
	font-size:12px;
}

Whenever I refresh the page the table stays exactly the same. I can change the font size, background etc. but not the size. Any help would be wonderful! Thanks for the time.