Anyone know how to shrink an input box?

Anyone know how to shrink an input box?

I'm working on a cart mock-up and have much of it the way I want. However the input boxes refuse to shrink and stay within the table data cell aligned with the title "Quantity:". Instead it drops down a line and extends full width.

I have all sorts of inline code in the first 3 tables to make the darn thing behave but none work.

I used element inspection tools to temporarily make size adjustments to the box and they worked using padding, height, width, and margin adjustments, but still the box would not jump inline with title "Quantity:". Also, I do not know how to make permanent box size overrides work with inline code. Can someone please help?

Here is the mock-up page:  http://m.publicmissiles.com/cart2.aspx

Thanks!