Where Can You Get Jordan's 11 In Size 14?

Assume you mean a US men's size 14.

There are a couple on Ebay.com right now:

Used Black and Red.

New White and Black.

Same seller both of those.  He implies that he might have other pairs not yet listed on Ebay, you could email him and ask.  But they are "retro" -- obsolete styles.

Here's another brand new size 14 pair, being auctioned, black+red again.  Cheaper than the used pair going on Ebay.  Originally sold for $125 (says this webpage), so bargain at a mere $87 for postage within the USA.

Else have a browse at what's on offer at nike-sneaker.com.  They imply that they might have size 14 in some of the Air Jordan 11 lines, you'll have to email about whichever style you're after.