Put together an Ikea drawer unit earlier today.

It is meant to go under a desk, but I want it alongside it and at the
same level, so it is 5cm too low - the thickness of the top piece of the
desk.

I've been looking for legs for it in order to raise it to the required
level, but to no avail. The adjustable legs that go under floor-standing
kitchen units would be ideal, only problem is that they are way too long
(min around 12cm).

Want them to be adjustable as it goes against a wall and on carpet, so
floor surface unlikely to be flat.

Any suggestions?