LED/LCD monitors are too low!

I've bought 1 24 inch acer LED monitor, 1 27 inch acer LED monitor and 1 24 inch Benq monitor

All have been toooo low for my eye height :(

I always work with a laptop riser and make sure the laptop is at the right height - and need an external monitor to be at the right height as well

What should I do? Put some books underneath? Get a desktop arm?

Thanks!


Omar