Width ignored on flexbox items

Question

http://jsfiddle.net/XW9Se/

I\'ve set width: 200px; on the left

but if I view it with the browser inspector tool it appears that the

Answer 1

The answer from Adrift is perfect; but a change to make it more flex would be

#left{
    flex-basis: 200px;
    flex-grow: 0;
    flex-shrink: 0;
}

And remove the width property entirely.

It would be the flex way to say that the element will have an invariable width of 200px