Now, let me be clear, while these are adjustable jack stands, they are not really something that you'd want to change on the fly throughout the course of the day, so be sure, this is no substitute for someone who wants both a sitting AND standing desk. For that, you've got to shell out the big bucks and buy a motorized system. This diy solution is more for someone who wants to commit to a standing desk, but wants the ability to dial in the perfect height for comfort and ergonomics.
For anyone who is thinking about converting to a standing desk - take a tip from someone who already has, you want to raise your whole desk up, not just your monitor and keyboard. Sure it's easier to simply raise your monitor on a stand or arm and buy a small platform that your keyboard and mouse can rest on at the proper height, as many diy standing desk conversions online suggest, but then you lose access to all the good stuff on your desk besides your computer. Where do you put your coffee, paperclips, obscene but thoughtful hand drawn christmas cards from co-workers and the 800 cords for your iPhone, camera, SD card reader and external hard drive? Having the whole desk at standing desk height sacrifices nothing (except your chair), gives you easier access to all your stuff.