Sometimes it is hard to get a clean reading on the back or front of the drawer due to nearby obstructions. If your drawer does not
fully extend out of the cabinet, it can be challenging to get a good measurement.
If you have trouble, the best strategy is to completely remove your drawer from the cabinet. At first it may seem that there's no
way to get it out, but keep looking things over and you will find the secret. It is extremely unlikely that your drawer slides
(or "runners") will not allow the quick removal of the drawer. You should not have to unscrew anything!