There aren’t “Component” in the sense that most of us use the term. I ordered these without checking the size and they are not component at all.
My very standard Onkyo receiver measures in at 17 1/8 wide by 13 inches deep. It’s nearly identical to my Sony unit. Those are standard Component size as far as the industry is concerned. Add to that a couple inches for wiring in the back. These shelves are useless for standard components.
They’re perfect for my center channel speaker though. Unfortunately, Woot! seems to only sell them in 3-packs anymore.