Actual measurements are something like 14 1/8 (if your drawer is exactly 14" long/deep this won't fit) and 10.5" wide and just short of 1.75" tall.  Please see photos for how I measured.

This is a nicely-constructed tray; it has dovetail joints on the corners and the bottom is inset rather than just attacked to the bottom-- should be very strong.

This fits perfectly into a flat USPS Priority mail box, so we'll throw it in one of those with some bubble wrap to avoid scuffing.